Mercurial > p > roundup > code
annotate roundup/date.py @ 869:6d98bec4e52e
fixed the journal bloat from multilink changes
we just log the add or remove operations, not the whole list
| author | Richard Jones <richard@users.sourceforge.net> |
|---|---|
| date | Sun, 14 Jul 2002 23:18:20 +0000 |
| parents | 68cef2bb929d |
| children | a568596dbea7 |
| rev | line source |
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1 # |
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2 # Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/) |
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3 # This module is free software, and you may redistribute it and/or modify |
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4 # under the same terms as Python, so long as this copyright message and |
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5 # disclaimer are retained in their original form. |
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6 # |
| 214 | 7 # IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR |
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8 # DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING |
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9 # OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE |
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10 # POSSIBILITY OF SUCH DAMAGE. |
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11 # |
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12 # BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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13 # BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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14 # FOR A PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS" |
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15 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE, |
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16 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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17 # |
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18 # $Id: date.py,v 1.22 2002-07-14 06:05:50 richard Exp $ |
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19 |
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20 __doc__ = """ |
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21 Date, time and time interval handling. |
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22 """ |
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23 |
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24 import time, re, calendar |
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25 from i18n import _ |
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26 |
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27 class Date: |
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28 ''' |
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29 As strings, date-and-time stamps are specified with the date in |
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30 international standard format (yyyy-mm-dd) joined to the time |
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31 (hh:mm:ss) by a period ("."). Dates in this form can be easily compared |
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32 and are fairly readable when printed. An example of a valid stamp is |
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33 "2000-06-24.13:03:59". We'll call this the "full date format". When |
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34 Timestamp objects are printed as strings, they appear in the full date |
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35 format with the time always given in GMT. The full date format is |
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36 always exactly 19 characters long. |
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37 |
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38 For user input, some partial forms are also permitted: the whole time |
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39 or just the seconds may be omitted; and the whole date may be omitted |
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40 or just the year may be omitted. If the time is given, the time is |
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41 interpreted in the user's local time zone. The Date constructor takes |
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42 care of these conversions. In the following examples, suppose that yyyy |
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43 is the current year, mm is the current month, and dd is the current day |
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44 of the month; and suppose that the user is on Eastern Standard Time. |
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45 |
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46 "2000-04-17" means <Date 2000-04-17.00:00:00> |
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47 "01-25" means <Date yyyy-01-25.00:00:00> |
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48 "2000-04-17.03:45" means <Date 2000-04-17.08:45:00> |
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49 "08-13.22:13" means <Date yyyy-08-14.03:13:00> |
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50 "11-07.09:32:43" means <Date yyyy-11-07.14:32:43> |
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51 "14:25" means <Date yyyy-mm-dd.19:25:00> |
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52 "8:47:11" means <Date yyyy-mm-dd.13:47:11> |
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53 "." means "right now" |
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54 |
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55 The Date class should understand simple date expressions of the form |
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56 stamp + interval and stamp - interval. When adding or subtracting |
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57 intervals involving months or years, the components are handled |
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58 separately. For example, when evaluating "2000-06-25 + 1m 10d", we |
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59 first add one month to get 2000-07-25, then add 10 days to get |
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60 2000-08-04 (rather than trying to decide whether 1m 10d means 38 or 40 |
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61 or 41 days). |
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62 |
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63 Example usage: |
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64 >>> Date(".") |
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65 <Date 2000-06-26.00:34:02> |
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66 >>> _.local(-5) |
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67 "2000-06-25.19:34:02" |
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68 >>> Date(". + 2d") |
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69 <Date 2000-06-28.00:34:02> |
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70 >>> Date("1997-04-17", -5) |
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71 <Date 1997-04-17.00:00:00> |
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72 >>> Date("01-25", -5) |
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73 <Date 2000-01-25.00:00:00> |
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74 >>> Date("08-13.22:13", -5) |
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75 <Date 2000-08-14.03:13:00> |
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76 >>> Date("14:25", -5) |
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77 <Date 2000-06-25.19:25:00> |
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78 ''' |
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79 def __init__(self, spec='.', offset=0): |
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80 """Construct a date given a specification and a time zone offset. |
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81 |
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82 'spec' is a full date or a partial form, with an optional |
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83 added or subtracted interval. Or a date 9-tuple. |
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84 'offset' is the local time zone offset from GMT in hours. |
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85 """ |
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86 if type(spec) == type(''): |
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87 self.set(spec, offset=offset) |
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88 else: |
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89 y,m,d,H,M,S,x,x,x = spec |
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90 ts = calendar.timegm((y,m,d,H+offset,M,S,0,0,0)) |
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91 self.year, self.month, self.day, self.hour, self.minute, \ |
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92 self.second, x, x, x = time.gmtime(ts) |
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93 |
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94 def addInterval(self, interval): |
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95 ''' Add the interval to this date, returning the date tuple |
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96 ''' |
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97 # do the basic calc |
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98 sign = interval.sign |
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99 year = self.year + sign * interval.year |
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100 month = self.month + sign * interval.month |
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101 day = self.day + sign * interval.day |
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102 hour = self.hour + sign * interval.hour |
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103 minute = self.minute + sign * interval.minute |
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104 second = self.second + sign * interval.second |
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105 |
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106 # now cope with under- and over-flow |
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107 # first do the time |
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108 while (second < 0 or second > 59 or minute < 0 or minute > 59 or |
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109 hour < 0 or hour > 59): |
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110 if second < 0: minute -= 1; second += 60 |
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111 elif second > 59: minute += 1; second -= 60 |
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112 if minute < 0: hour -= 1; minute += 60 |
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113 elif minute > 59: hour += 1; minute -= 60 |
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114 if hour < 0: day -= 1; hour += 24 |
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115 elif hour > 59: day += 1; hour -= 24 |
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116 |
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117 # fix up the month so we're within range |
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118 while month < 1 or month > 12: |
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119 if month < 1: year -= 1; month += 12 |
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120 if month > 12: year += 1; month -= 12 |
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121 |
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122 # now do the days, now that we know what month we're in |
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123 mdays = calendar.mdays |
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124 if month == 2 and calendar.isleap(year): month_days = 29 |
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125 else: month_days = mdays[month] |
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126 while month < 1 or month > 12 or day < 0 or day > month_days: |
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127 # now to day under/over |
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128 if day < 0: month -= 1; day += month_days |
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129 elif day > month_days: month += 1; day -= month_days |
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130 |
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131 # possibly fix up the month so we're within range |
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132 while month < 1 or month > 12: |
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133 if month < 1: year -= 1; month += 12 |
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134 if month > 12: year += 1; month -= 12 |
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135 |
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136 # re-figure the number of days for this month |
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137 if month == 2 and calendar.isleap(year): month_days = 29 |
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138 else: month_days = mdays[month] |
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139 return (year, month, day, hour, minute, second, 0, 0, 0) |
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140 |
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141 def applyInterval(self, interval): |
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142 ''' Apply the interval to this date |
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143 ''' |
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144 self.year, self.month, self.day, self.hour, self.minute, \ |
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145 self.second, x, x, x = self.addInterval(interval) |
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146 |
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147 def __add__(self, interval): |
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148 """Add an interval to this date to produce another date. |
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149 """ |
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150 return Date(self.addInterval(interval)) |
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151 |
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152 # XXX deviates from spec to allow subtraction of dates as well |
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153 def __sub__(self, other): |
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154 """ Subtract: |
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155 1. an interval from this date to produce another date. |
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156 2. a date from this date to produce an interval. |
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157 """ |
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158 if isinstance(other, Interval): |
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159 other = Interval(other.get_tuple(), sign=-other.sign) |
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160 return self.__add__(other) |
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161 |
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162 assert isinstance(other, Date), 'May only subtract Dates or Intervals' |
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163 |
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164 # TODO this code will fall over laughing if the dates cross |
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165 # leap years, phases of the moon, .... |
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166 a = calendar.timegm((self.year, self.month, self.day, self.hour, |
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167 self.minute, self.second, 0, 0, 0)) |
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168 b = calendar.timegm((other.year, other.month, other.day, |
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169 other.hour, other.minute, other.second, 0, 0, 0)) |
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170 diff = a - b |
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171 if diff < 0: |
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172 sign = 1 |
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173 diff = -diff |
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174 else: |
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175 sign = -1 |
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176 S = diff%60 |
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177 M = (diff/60)%60 |
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178 H = (diff/(60*60))%60 |
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179 if H>1: S = 0 |
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180 d = (diff/(24*60*60))%30 |
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181 if d>1: H = S = M = 0 |
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182 m = (diff/(30*24*60*60))%12 |
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183 if m>1: H = S = M = 0 |
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184 y = (diff/(365*24*60*60)) |
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185 if y>1: d = H = S = M = 0 |
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186 return Interval((y, m, d, H, M, S), sign=sign) |
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187 |
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188 def __cmp__(self, other): |
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189 """Compare this date to another date.""" |
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190 if other is None: |
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191 return 1 |
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192 for attr in ('year', 'month', 'day', 'hour', 'minute', 'second'): |
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193 r = cmp(getattr(self, attr), getattr(other, attr)) |
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194 if r: return r |
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195 return 0 |
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196 |
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197 def __str__(self): |
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198 """Return this date as a string in the yyyy-mm-dd.hh:mm:ss format.""" |
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206
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199 return '%4d-%02d-%02d.%02d:%02d:%02d'%(self.year, self.month, self.day, |
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200 self.hour, self.minute, self.second) |
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201 |
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202 def pretty(self): |
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203 ''' print up the date date using a pretty format... |
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204 ''' |
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205 str = time.strftime('%d %B %Y', (self.year, self.month, |
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206 self.day, self.hour, self.minute, self.second, 0, 0, 0)) |
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207 if str[0] == '0': return ' ' + str[1:] |
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208 return str |
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209 |
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210 def set(self, spec, offset=0, date_re=re.compile(r''' |
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211 (((?P<y>\d\d\d\d)-)?((?P<m>\d\d?)-(?P<d>\d\d?))?)? # yyyy-mm-dd |
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212 (?P<n>\.)? # . |
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213 (((?P<H>\d?\d):(?P<M>\d\d))?(:(?P<S>\d\d))?)? # hh:mm:ss |
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214 (?P<o>.+)? # offset |
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215 ''', re.VERBOSE)): |
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216 ''' set the date to the value in spec |
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217 ''' |
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218 m = date_re.match(spec) |
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219 if not m: |
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220 raise ValueError, _('Not a date spec: [[yyyy-]mm-dd].[[h]h:mm[:ss]]' |
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221 '[offset]') |
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222 info = m.groupdict() |
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223 |
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224 # get the current date/time using the offset |
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225 y,m,d,H,M,S,x,x,x = time.gmtime(time.time()) |
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226 |
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227 # override year, month, day parts |
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228 if info['m'] is not None and info['d'] is not None: |
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229 m = int(info['m']) |
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230 d = int(info['d']) |
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231 if info['y'] is not None: y = int(info['y']) |
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232 H = M = S = 0 |
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233 |
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234 # override hour, minute, second parts |
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235 if info['H'] is not None and info['M'] is not None: |
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236 H = int(info['H']) - offset |
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237 M = int(info['M']) |
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238 S = 0 |
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239 if info['S'] is not None: S = int(info['S']) |
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240 |
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241 # now handle the adjustment of hour |
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242 ts = calendar.timegm((y,m,d,H,M,S,0,0,0)) |
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243 self.year, self.month, self.day, self.hour, self.minute, \ |
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244 self.second, x, x, x = time.gmtime(ts) |
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245 |
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246 if info['o']: |
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247 self.applyInterval(Interval(info['o'])) |
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248 |
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249 def __repr__(self): |
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250 return '<Date %s>'%self.__str__() |
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251 |
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252 def local(self, offset): |
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253 """Return this date as yyyy-mm-dd.hh:mm:ss in a local time zone.""" |
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254 t = (self.year, self.month, self.day, self.hour + offset, self.minute, |
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255 self.second, 0, 0, 0) |
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256 self.year, self.month, self.day, self.hour, self.minute, \ |
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257 self.second, x, x, x = time.gmtime(calendar.timegm(t)) |
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258 |
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259 def get_tuple(self): |
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260 return (self.year, self.month, self.day, self.hour, self.minute, |
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261 self.second, 0, 0, 0) |
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262 |
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263 class Interval: |
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264 ''' |
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265 Date intervals are specified using the suffixes "y", "m", and "d". The |
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266 suffix "w" (for "week") means 7 days. Time intervals are specified in |
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267 hh:mm:ss format (the seconds may be omitted, but the hours and minutes |
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268 may not). |
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269 |
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270 "3y" means three years |
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271 "2y 1m" means two years and one month |
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272 "1m 25d" means one month and 25 days |
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273 "2w 3d" means two weeks and three days |
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274 "1d 2:50" means one day, two hours, and 50 minutes |
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275 "14:00" means 14 hours |
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276 "0:04:33" means four minutes and 33 seconds |
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277 |
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278 Example usage: |
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279 >>> Interval(" 3w 1 d 2:00") |
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280 <Interval 22d 2:00> |
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281 >>> Date(". + 2d") + Interval("- 3w") |
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282 <Date 2000-06-07.00:34:02> |
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283 |
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284 Intervals are added/subtracted in order of: |
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285 seconds, minutes, hours, years, months, days |
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286 |
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287 Calculations involving monts (eg '+2m') have no effect on days - only |
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288 days (or over/underflow from hours/mins/secs) will do that, and |
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289 days-per-month and leap years are accounted for. Leap seconds are not. |
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290 |
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291 TODO: more examples, showing the order of addition operation |
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292 ''' |
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293 def __init__(self, spec, sign=1): |
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294 """Construct an interval given a specification.""" |
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295 if type(spec) == type(''): |
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296 self.set(spec) |
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297 else: |
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298 self.sign = sign |
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299 self.year, self.month, self.day, self.hour, self.minute, \ |
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300 self.second = spec |
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301 |
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302 def __cmp__(self, other): |
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303 """Compare this interval to another interval.""" |
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304 if other is None: |
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305 return 1 |
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306 for attr in ('year', 'month', 'day', 'hour', 'minute', 'second'): |
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307 r = cmp(getattr(self, attr), getattr(other, attr)) |
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308 if r: return r |
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309 return 0 |
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310 |
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311 def __str__(self): |
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312 """Return this interval as a string.""" |
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313 sign = {1:'+', -1:'-'}[self.sign] |
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314 l = [sign] |
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315 if self.year: l.append('%sy'%self.year) |
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316 if self.month: l.append('%sm'%self.month) |
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317 if self.day: l.append('%sd'%self.day) |
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318 if self.second: |
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319 l.append('%d:%02d:%02d'%(self.hour, self.minute, self.second)) |
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320 elif self.hour or self.minute: |
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321 l.append('%d:%02d'%(self.hour, self.minute)) |
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322 return ' '.join(l) |
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323 |
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324 def set(self, spec, interval_re = re.compile(''' |
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325 \s* |
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326 (?P<s>[-+])? # + or - |
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327 \s* |
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328 ((?P<y>\d+\s*)y)? # year |
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329 \s* |
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330 ((?P<m>\d+\s*)m)? # month |
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331 \s* |
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332 ((?P<w>\d+\s*)w)? # week |
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333 \s* |
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334 ((?P<d>\d+\s*)d)? # day |
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335 \s* |
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336 (((?P<H>\d+):(?P<M>\d+))?(:(?P<S>\d+))?)? # time |
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337 \s* |
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338 ''', re.VERBOSE)): |
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339 ''' set the date to the value in spec |
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340 ''' |
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341 self.year = self.month = self.week = self.day = self.hour = \ |
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342 self.minute = self.second = 0 |
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343 self.sign = 1 |
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344 m = interval_re.match(spec) |
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345 if not m: |
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346 raise ValueError, _('Not an interval spec: [+-] [#y] [#m] [#w] ' |
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347 '[#d] [[[H]H:MM]:SS]') |
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348 |
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349 info = m.groupdict() |
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350 for group, attr in {'y':'year', 'm':'month', 'w':'week', 'd':'day', |
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351 'H':'hour', 'M':'minute', 'S':'second'}.items(): |
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352 if info[group] is not None: |
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353 setattr(self, attr, int(info[group])) |
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354 |
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355 if self.week: |
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356 self.day = self.day + self.week*7 |
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357 |
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358 if info['s'] is not None: |
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359 self.sign = {'+':1, '-':-1}[info['s']] |
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360 |
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361 def __repr__(self): |
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362 return '<Interval %s>'%self.__str__() |
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363 |
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364 def pretty(self): |
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365 ''' print up the date date using one of these nice formats.. |
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366 ''' |
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367 if self.year: |
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368 if self.year == 1: |
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369 return _('1 year') |
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370 else: |
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371 return _('%(number)s years')%{'number': self.year} |
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372 elif self.month or self.day > 13: |
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373 days = (self.month * 30) + self.day |
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374 if days > 28: |
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375 if int(days/30) > 1: |
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376 s = _('%(number)s months')%{'number': int(days/30)} |
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377 else: |
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378 s = _('1 month') |
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379 else: |
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380 s = _('%(number)s weeks')%{'number': int(days/7)} |
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381 elif self.day > 7: |
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382 s = _('1 week') |
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383 elif self.day > 1: |
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384 s = _('%(number)s days')%{'number': self.day} |
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385 elif self.day == 1 or self.hour > 12: |
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386 if self.sign > 0: |
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387 return _('tomorrow') |
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388 else: |
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389 return _('yesterday') |
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390 elif self.hour > 1: |
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391 s = _('%(number)s hours')%{'number': self.hour} |
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392 elif self.hour == 1: |
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393 if self.minute < 15: |
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394 s = _('an hour') |
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395 elif self.minute/15 == 2: |
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396 s = _('1 1/2 hours') |
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397 else: |
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398 s = _('1 %(number)s/4 hours')%{'number': self.minute/15} |
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399 elif self.minute < 1: |
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400 if self.sign > 0: |
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401 return _('in a moment') |
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402 else: |
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403 return _('just now') |
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404 elif self.minute == 1: |
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405 s = _('1 minute') |
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406 elif self.minute < 15: |
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407 s = _('%(number)s minutes')%{'number': self.minute} |
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408 elif int(self.minute/15) == 2: |
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409 s = _('1/2 an hour') |
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410 else: |
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411 s = _('%(number)s/4 hour')%{'number': int(self.minute/15)} |
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412 return s |
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413 |
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414 def get_tuple(self): |
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415 return (self.year, self.month, self.day, self.hour, self.minute, |
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416 self.second) |
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417 |
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418 |
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419 def test(): |
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420 intervals = (" 3w 1 d 2:00", " + 2d", "3w") |
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421 for interval in intervals: |
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422 print '>>> Interval("%s")'%interval |
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423 print `Interval(interval)` |
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424 |
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425 dates = (".", "2000-06-25.19:34:02", ". + 2d", "1997-04-17", "01-25", |
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426 "08-13.22:13", "14:25") |
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427 for date in dates: |
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428 print '>>> Date("%s")'%date |
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429 print `Date(date)` |
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430 |
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431 sums = ((". + 2d", "3w"), (".", " 3w 1 d 2:00")) |
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432 for date, interval in sums: |
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433 print '>>> Date("%s") + Interval("%s")'%(date, interval) |
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434 print `Date(date) + Interval(interval)` |
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435 |
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436 if __name__ == '__main__': |
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437 test() |
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438 |
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439 # |
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440 # $Log: not supported by cvs2svn $ |
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441 # Revision 1.21 2002/05/15 06:32:46 richard |
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442 # . reverting to dates for intervals > 2 months sucks |
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443 # |
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444 # Revision 1.20 2002/02/21 23:34:51 richard |
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445 # Oops, there's 24 hours in a day, and subtraction of intervals now works |
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446 # properly. |
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|
447 # |
|
641
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Oops, there's 24 hours in a day...
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448 # Revision 1.19 2002/02/21 23:11:45 richard |
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Oops, there's 24 hours in a day...
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449 # . fixed some problems in date calculations (calendar.py doesn't handle over- |
|
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Oops, there's 24 hours in a day...
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450 # and under-flow). Also, hour/minute/second intervals may now be more than |
|
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Oops, there's 24 hours in a day...
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451 # 99 each. |
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Oops, there's 24 hours in a day...
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452 # |
|
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453 # Revision 1.18 2002/01/23 20:00:50 jhermann |
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454 # %e is a UNIXism and not documented for Python |
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455 # |
|
585
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%e is a UNIXism and not documented for Python
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456 # Revision 1.17 2002/01/16 07:02:57 richard |
|
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%e is a UNIXism and not documented for Python
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457 # . lots of date/interval related changes: |
|
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|
458 # - more relaxed date format for input |
|
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|
459 # |
|
543
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|
460 # Revision 1.16 2002/01/08 11:56:24 richard |
|
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lots of date/interval related changes: more relaxed date format for input
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parents:
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|
461 # missed an import _ |
|
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parents:
501
diff
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|
462 # |
|
501
e0944187229f
missed an import _
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diff
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|
463 # Revision 1.15 2002/01/05 02:27:00 richard |
|
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missed an import _
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diff
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|
464 # I18N'ification |
|
e0944187229f
missed an import _
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parents:
487
diff
changeset
|
465 # |
|
487
2f4c37d28108
I18N'ification
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406
diff
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|
466 # Revision 1.14 2001/11/22 15:46:42 jhermann |
|
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I18N'ification
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406
diff
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|
467 # Added module docstrings to all modules. |
|
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I18N'ification
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406
diff
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|
468 # |
|
406
bdc2ea127ae9
Added module docstrings to all modules.
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469 # Revision 1.13 2001/09/18 22:58:37 richard |
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470 # |
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471 # Added some more help to roundu-admin |
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472 # |
|
248
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473 # Revision 1.12 2001/08/17 03:08:11 richard |
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474 # fixed prettification of intervals of 1 week |
|
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|
475 # |
|
234
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476 # Revision 1.11 2001/08/15 23:43:18 richard |
|
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|
477 # Fixed some isFooTypes that I missed. |
|
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478 # Refactored some code in the CGI code. |
|
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228
diff
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|
479 # |
|
228
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Fixed some isFooTypes that I missed.
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diff
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|
480 # Revision 1.10 2001/08/07 00:24:42 richard |
|
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Fixed some isFooTypes that I missed.
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|
481 # stupid typo |
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482 # |
| 214 | 483 # Revision 1.9 2001/08/07 00:15:51 richard |
| 484 # Added the copyright/license notice to (nearly) all files at request of | |
| 485 # Bizar Software. | |
| 486 # | |
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487 # Revision 1.8 2001/08/05 07:46:12 richard |
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488 # Changed date.Date to use regular string formatting instead of strftime - |
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489 # win32 seems to have problems with %T and no hour... or something... |
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490 # |
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491 # Revision 1.7 2001/08/02 00:27:04 richard |
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492 # Extended the range of intervals that are pretty-printed before actual dates |
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493 # are displayed. |
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494 # |
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495 # Revision 1.6 2001/07/31 09:54:18 richard |
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496 # Fixed the 2.1-specific gmtime() (no arg) call in roundup.date. (Paul Wright) |
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497 # |
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498 # Revision 1.5 2001/07/29 07:01:39 richard |
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499 # Added vim command to all source so that we don't get no steenkin' tabs :) |
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500 # |
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501 # Revision 1.4 2001/07/25 04:09:34 richard |
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502 # Fixed offset handling (shoulda read the spec a little better) |
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503 # |
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504 # Revision 1.3 2001/07/23 07:56:05 richard |
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505 # Storing only marshallable data in the db - no nasty pickled class references. |
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506 # |
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507 # Revision 1.2 2001/07/22 12:09:32 richard |
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508 # Final commit of Grande Splite |
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509 # |
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Final commit of Grande Splite
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510 # Revision 1.1 2001/07/22 11:58:35 richard |
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511 # More Grande Splite |
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More Grande Splite
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512 # |
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513 # |
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514 # vim: set filetype=python ts=4 sw=4 et si |
