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annotate roundup/date.py @ 571:2998d683e2cf

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Fixed status change in mail gateway.
author Roche Compaan <rochecompaan@users.sourceforge.net>
date Tue, 22 Jan 2002 11:54:45 +0000
parents 22e0edf7da6e
children c08fb4921eda
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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 #
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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 1.17 2002-01-16 07:02:57 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 applyInterval(self, interval):
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95 ''' Apply the interval to this date
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96 '''
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97 t = (self.year + interval.year,
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98 self.month + interval.month,
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99 self.day + interval.day,
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100 self.hour + interval.hour,
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101 self.minute + interval.minute,
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102 self.second + interval.second, 0, 0, 0)
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103 self.year, self.month, self.day, self.hour, self.minute, \
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104 self.second, x, x, x = time.gmtime(calendar.timegm(t))
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105
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106 def __add__(self, other):
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107 """Add an interval to this date to produce another date."""
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108 t = (self.year + other.sign * other.year,
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109 self.month + other.sign * other.month,
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110 self.day + other.sign * other.day,
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111 self.hour + other.sign * other.hour,
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112 self.minute + other.sign * other.minute,
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113 self.second + other.sign * other.second, 0, 0, 0)
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114 return Date(time.gmtime(calendar.timegm(t)))
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115
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116 # XXX deviates from spec to allow subtraction of dates as well
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117 def __sub__(self, other):
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118 """ Subtract:
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119 1. an interval from this date to produce another date.
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120 2. a date from this date to produce an interval.
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121 """
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122 if isinstance(other, Date):
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123 # TODO this code will fall over laughing if the dates cross
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124 # leap years, phases of the moon, ....
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125 a = calendar.timegm((self.year, self.month, self.day, self.hour,
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126 self.minute, self.second, 0, 0, 0))
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127 b = calendar.timegm((other.year, other.month, other.day, other.hour,
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128 other.minute, other.second, 0, 0, 0))
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129 diff = a - b
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130 if diff < 0:
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131 sign = -1
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132 diff = -diff
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133 else:
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134 sign = 1
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135 S = diff%60
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136 M = (diff/60)%60
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137 H = (diff/(60*60))%60
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138 if H>1: S = 0
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139 d = (diff/(24*60*60))%30
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140 if d>1: H = S = M = 0
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141 m = (diff/(30*24*60*60))%12
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142 if m>1: H = S = M = 0
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143 y = (diff/(365*24*60*60))
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144 if y>1: d = H = S = M = 0
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145 return Interval((y, m, d, H, M, S), sign=sign)
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146 t = (self.year - other.sign * other.year,
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147 self.month - other.sign * other.month,
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148 self.day - other.sign * other.day,
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149 self.hour - other.sign * other.hour,
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150 self.minute - other.sign * other.minute,
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151 self.second - other.sign * other.second, 0, 0, 0)
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152 return Date(time.gmtime(calendar.timegm(t)))
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153
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154 def __cmp__(self, other):
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155 """Compare this date to another date."""
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156 if other is None:
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157 return 1
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158 for attr in ('year', 'month', 'day', 'hour', 'minute', 'second'):
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159 r = cmp(getattr(self, attr), getattr(other, attr))
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160 if r: return r
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161 return 0
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162
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163 def __str__(self):
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164 """Return this date as a string in the yyyy-mm-dd.hh:mm:ss format."""
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165 return '%4d-%02d-%02d.%02d:%02d:%02d'%(self.year, self.month, self.day,
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166 self.hour, self.minute, self.second)
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167
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168 def pretty(self):
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169 ''' print up the date date using a pretty format...
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170 '''
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171 return time.strftime('%e %B %Y', (self.year, self.month,
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172 self.day, self.hour, self.minute, self.second, 0, 0, 0))
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173
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174 def set(self, spec, offset=0, date_re=re.compile(r'''
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175 (((?P<y>\d\d\d\d)-)?((?P<m>\d\d?)-(?P<d>\d\d?))?)? # yyyy-mm-dd
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176 (?P<n>\.)? # .
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177 (((?P<H>\d?\d):(?P<M>\d\d))?(:(?P<S>\d\d))?)? # hh:mm:ss
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178 (?P<o>.+)? # offset
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179 ''', re.VERBOSE)):
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180 ''' set the date to the value in spec
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181 '''
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182 m = date_re.match(spec)
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183 if not m:
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184 raise ValueError, _('Not a date spec: [[yyyy-]mm-dd].[[h]h:mm[:ss]]'
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185 '[offset]')
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186 info = m.groupdict()
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187
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188 # get the current date/time using the offset
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189 y,m,d,H,M,S,x,x,x = time.gmtime(time.time())
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190
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191 # override year, month, day parts
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192 if info['m'] is not None and info['d'] is not None:
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193 m = int(info['m'])
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194 d = int(info['d'])
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195 if info['y'] is not None: y = int(info['y'])
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196 H = M = S = 0
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197
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198 # override hour, minute, second parts
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199 if info['H'] is not None and info['M'] is not None:
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200 H = int(info['H']) - offset
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201 M = int(info['M'])
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202 S = 0
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203 if info['S'] is not None: S = int(info['S'])
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204
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205 # now handle the adjustment of hour
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206 ts = calendar.timegm((y,m,d,H,M,S,0,0,0))
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207 self.year, self.month, self.day, self.hour, self.minute, \
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208 self.second, x, x, x = time.gmtime(ts)
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209
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210 if info['o']:
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211 self.applyInterval(Interval(info['o']))
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212
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213 def __repr__(self):
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214 return '<Date %s>'%self.__str__()
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215
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216 def local(self, offset):
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217 """Return this date as yyyy-mm-dd.hh:mm:ss in a local time zone."""
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218 t = (self.year, self.month, self.day, self.hour + offset, self.minute,
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219 self.second, 0, 0, 0)
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220 self.year, self.month, self.day, self.hour, self.minute, \
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221 self.second, x, x, x = time.gmtime(calendar.timegm(t))
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222
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223 def get_tuple(self):
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224 return (self.year, self.month, self.day, self.hour, self.minute,
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225 self.second, 0, 0, 0)
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226
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227 class Interval:
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228 '''
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229 Date intervals are specified using the suffixes "y", "m", and "d". The
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230 suffix "w" (for "week") means 7 days. Time intervals are specified in
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231 hh:mm:ss format (the seconds may be omitted, but the hours and minutes
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232 may not).
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233
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234 "3y" means three years
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235 "2y 1m" means two years and one month
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236 "1m 25d" means one month and 25 days
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237 "2w 3d" means two weeks and three days
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238 "1d 2:50" means one day, two hours, and 50 minutes
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239 "14:00" means 14 hours
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240 "0:04:33" means four minutes and 33 seconds
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241
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242 Example usage:
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243 >>> Interval(" 3w 1 d 2:00")
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244 <Interval 22d 2:00>
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245 >>> Date(". + 2d") - Interval("3w")
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246 <Date 2000-06-07.00:34:02>
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247 '''
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248 def __init__(self, spec, sign=1):
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249 """Construct an interval given a specification."""
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250 if type(spec) == type(''):
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251 self.set(spec)
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252 else:
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253 self.sign = sign
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254 self.year, self.month, self.day, self.hour, self.minute, \
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255 self.second = spec
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256
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257 def __cmp__(self, other):
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258 """Compare this interval to another interval."""
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259 if other is None:
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260 return 1
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261 for attr in ('year', 'month', 'day', 'hour', 'minute', 'second'):
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262 r = cmp(getattr(self, attr), getattr(other, attr))
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263 if r: return r
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264 return 0
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265
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266 def __str__(self):
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267 """Return this interval as a string."""
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268 sign = {1:'+', -1:'-'}[self.sign]
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269 l = [sign]
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270 if self.year: l.append('%sy'%self.year)
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271 if self.month: l.append('%sm'%self.month)
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272 if self.day: l.append('%sd'%self.day)
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273 if self.second:
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274 l.append('%d:%02d:%02d'%(self.hour, self.minute, self.second))
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275 elif self.hour or self.minute:
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276 l.append('%d:%02d'%(self.hour, self.minute))
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277 return ' '.join(l)
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278
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279 def set(self, spec, interval_re = re.compile('''
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280 \s*
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281 (?P<s>[-+])? # + or -
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282 \s*
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283 ((?P<y>\d+\s*)y)? # year
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284 \s*
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285 ((?P<m>\d+\s*)m)? # month
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286 \s*
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287 ((?P<w>\d+\s*)w)? # week
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288 \s*
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289 ((?P<d>\d+\s*)d)? # day
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290 \s*
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291 (((?P<H>\d?\d):(?P<M>\d\d))?(:(?P<S>\d\d))?)? # time
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292 \s*
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293 ''', re.VERBOSE)):
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294 ''' set the date to the value in spec
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295 '''
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296 self.year = self.month = self.week = self.day = self.hour = \
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297 self.minute = self.second = 0
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298 self.sign = 1
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299 m = interval_re.match(spec)
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300 if not m:
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301 raise ValueError, _('Not an interval spec: [+-] [#y] [#m] [#w] '
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302 '[#d] [[[H]H:MM]:SS]')
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303
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304 info = m.groupdict()
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305 for group, attr in {'y':'year', 'm':'month', 'w':'week', 'd':'day',
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306 'H':'hour', 'M':'minute', 'S':'second'}.items():
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307 if info[group] is not None:
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308 setattr(self, attr, int(info[group]))
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309
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310 if self.week:
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311 self.day = self.day + self.week*7
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312
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313 if info['s'] is not None:
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314 self.sign = {'+':1, '-':-1}[info['s']]
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315
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316 def __repr__(self):
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317 return '<Interval %s>'%self.__str__()
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318
487
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319 def pretty(self):
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320 ''' print up the date date using one of these nice formats..
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321 '''
179
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322 if self.year or self.month > 2:
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323 return None
248
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324 if self.month or self.day > 13:
179
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325 days = (self.month * 30) + self.day
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326 if days > 28:
248
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327 if int(days/30) > 1:
487
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328 return _('%(number)s months')%{'number': int(days/30)}
248
96cdd8ef0581 Added some more help to roundup-admin
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329 else:
487
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330 return _('1 month')
179
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331 else:
487
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332 return _('%(number)s weeks')%{'number': int(days/7)}
179
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333 if self.day > 7:
487
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334 return _('1 week')
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335 if self.day > 1:
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336 return _('%(number)s days')%{'number': self.day}
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337 if self.day == 1 or self.hour > 12:
487
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338 return _('yesterday')
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339 if self.hour > 1:
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340 return _('%(number)s hours')%{'number': self.hour}
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341 if self.hour == 1:
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342 if self.minute < 15:
487
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343 return _('an hour')
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344 quart = self.minute/15
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345 if quart == 2:
487
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diff changeset
346 return _('1 1/2 hours')
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347 return _('1 %(number)s/4 hours')%{'number': quart}
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348 if self.minute < 1:
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349 return _('just now')
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350 if self.minute == 1:
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351 return _('1 minute')
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352 if self.minute < 15:
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353 return _('%(number)s minutes')%{'number': self.minute}
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354 quart = int(self.minute/15)
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355 if quart == 2:
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356 return _('1/2 an hour')
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357 return _('%(number)s/4 hour')%{'number': quart}
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358
47
34491d9b91a0 Storing only marshallable data in the db - no nasty pickled class references.
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diff changeset
359 def get_tuple(self):
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diff changeset
360 return (self.year, self.month, self.day, self.hour, self.minute,
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diff changeset
361 self.second)
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362
25
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363
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364 def test():
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365 intervals = (" 3w 1 d 2:00", " + 2d", "3w")
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366 for interval in intervals:
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367 print '>>> Interval("%s")'%interval
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368 print `Interval(interval)`
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369
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370 dates = (".", "2000-06-25.19:34:02", ". + 2d", "1997-04-17", "01-25",
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371 "08-13.22:13", "14:25")
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372 for date in dates:
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diff changeset
373 print '>>> Date("%s")'%date
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diff changeset
374 print `Date(date)`
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diff changeset
375
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376 sums = ((". + 2d", "3w"), (".", " 3w 1 d 2:00"))
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377 for date, interval in sums:
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diff changeset
378 print '>>> Date("%s") + Interval("%s")'%(date, interval)
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diff changeset
379 print `Date(date) + Interval(interval)`
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diff changeset
380
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diff changeset
381 if __name__ == '__main__':
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diff changeset
382 test()
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383
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diff changeset
384 #
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diff changeset
385 # $Log: not supported by cvs2svn $
543
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diff changeset
386 # Revision 1.16 2002/01/08 11:56:24 richard
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parents: 501
diff changeset
387 # missed an import _
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parents: 501
diff changeset
388 #
501
e0944187229f missed an import _
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parents: 487
diff changeset
389 # Revision 1.15 2002/01/05 02:27:00 richard
e0944187229f missed an import _
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parents: 487
diff changeset
390 # I18N'ification
e0944187229f missed an import _
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parents: 487
diff changeset
391 #
487
2f4c37d28108 I18N'ification
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diff changeset
392 # Revision 1.14 2001/11/22 15:46:42 jhermann
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parents: 406
diff changeset
393 # Added module docstrings to all modules.
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parents: 406
diff changeset
394 #
406
bdc2ea127ae9 Added module docstrings to all modules.
Jürgen Hermann <jhermann@users.sourceforge.net>
parents: 248
diff changeset
395 # Revision 1.13 2001/09/18 22:58:37 richard
bdc2ea127ae9 Added module docstrings to all modules.
Jürgen Hermann <jhermann@users.sourceforge.net>
parents: 248
diff changeset
396 #
bdc2ea127ae9 Added module docstrings to all modules.
Jürgen Hermann <jhermann@users.sourceforge.net>
parents: 248
diff changeset
397 # Added some more help to roundu-admin
bdc2ea127ae9 Added module docstrings to all modules.
Jürgen Hermann <jhermann@users.sourceforge.net>
parents: 248
diff changeset
398 #
248
96cdd8ef0581 Added some more help to roundup-admin
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parents: 234
diff changeset
399 # Revision 1.12 2001/08/17 03:08:11 richard
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parents: 234
diff changeset
400 # fixed prettification of intervals of 1 week
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parents: 234
diff changeset
401 #
234
0dfe39b4fa17 fixed prettification of intervals of 1 week
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parents: 228
diff changeset
402 # Revision 1.11 2001/08/15 23:43:18 richard
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parents: 228
diff changeset
403 # Fixed some isFooTypes that I missed.
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parents: 228
diff changeset
404 # Refactored some code in the CGI code.
0dfe39b4fa17 fixed prettification of intervals of 1 week
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parents: 228
diff changeset
405 #
228
1d1848c99abe Fixed some isFooTypes that I missed.
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parents: 214
diff changeset
406 # Revision 1.10 2001/08/07 00:24:42 richard
1d1848c99abe Fixed some isFooTypes that I missed.
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parents: 214
diff changeset
407 # stupid typo
1d1848c99abe Fixed some isFooTypes that I missed.
Richard Jones <richard@users.sourceforge.net>
parents: 214
diff changeset
408 #
214
18134bffab37 stupid typo
Richard Jones <richard@users.sourceforge.net>
parents: 213
diff changeset
409 # Revision 1.9 2001/08/07 00:15:51 richard
18134bffab37 stupid typo
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parents: 213
diff changeset
410 # Added the copyright/license notice to (nearly) all files at request of
18134bffab37 stupid typo
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parents: 213
diff changeset
411 # Bizar Software.
18134bffab37 stupid typo
Richard Jones <richard@users.sourceforge.net>
parents: 213
diff changeset
412 #
213
d45384bc6420 Added the copyright/license notice to (nearly) all files...
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parents: 206
diff changeset
413 # Revision 1.8 2001/08/05 07:46:12 richard
d45384bc6420 Added the copyright/license notice to (nearly) all files...
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parents: 206
diff changeset
414 # Changed date.Date to use regular string formatting instead of strftime -
d45384bc6420 Added the copyright/license notice to (nearly) all files...
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parents: 206
diff changeset
415 # win32 seems to have problems with %T and no hour... or something...
d45384bc6420 Added the copyright/license notice to (nearly) all files...
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parents: 206
diff changeset
416 #
206
1eb862f4bf56 Changed date.Date to use regular string formatting instead of strftime.
Richard Jones <richard@users.sourceforge.net>
parents: 179
diff changeset
417 # Revision 1.7 2001/08/02 00:27:04 richard
1eb862f4bf56 Changed date.Date to use regular string formatting instead of strftime.
Richard Jones <richard@users.sourceforge.net>
parents: 179
diff changeset
418 # Extended the range of intervals that are pretty-printed before actual dates
1eb862f4bf56 Changed date.Date to use regular string formatting instead of strftime.
Richard Jones <richard@users.sourceforge.net>
parents: 179
diff changeset
419 # are displayed.
1eb862f4bf56 Changed date.Date to use regular string formatting instead of strftime.
Richard Jones <richard@users.sourceforge.net>
parents: 179
diff changeset
420 #
179
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parents: 168
diff changeset
421 # Revision 1.6 2001/07/31 09:54:18 richard
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parents: 168
diff changeset
422 # Fixed the 2.1-specific gmtime() (no arg) call in roundup.date. (Paul Wright)
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parents: 168
diff changeset
423 #
168
92ac7b6c0301 Fixed the 2.1-specific gmtime() (no arg) call in roundup.date. (Paul Wright)
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parents: 127
diff changeset
424 # Revision 1.5 2001/07/29 07:01:39 richard
92ac7b6c0301 Fixed the 2.1-specific gmtime() (no arg) call in roundup.date. (Paul Wright)
Richard Jones <richard@users.sourceforge.net>
parents: 127
diff changeset
425 # Added vim command to all source so that we don't get no steenkin' tabs :)
92ac7b6c0301 Fixed the 2.1-specific gmtime() (no arg) call in roundup.date. (Paul Wright)
Richard Jones <richard@users.sourceforge.net>
parents: 127
diff changeset
426 #
127
0791d13baea7 Added vim command to all source so that we don't get no steenkin' tabs :)
Richard Jones <richard@users.sourceforge.net>
parents: 75
diff changeset
427 # Revision 1.4 2001/07/25 04:09:34 richard
0791d13baea7 Added vim command to all source so that we don't get no steenkin' tabs :)
Richard Jones <richard@users.sourceforge.net>
parents: 75
diff changeset
428 # Fixed offset handling (shoulda read the spec a little better)
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Richard Jones <richard@users.sourceforge.net>
parents: 75
diff changeset
429 #
75
fa5aea4c212e Fixed offset handling (shoulda read the spec a little better)
Richard Jones <richard@users.sourceforge.net>
parents: 47
diff changeset
430 # Revision 1.3 2001/07/23 07:56:05 richard
fa5aea4c212e Fixed offset handling (shoulda read the spec a little better)
Richard Jones <richard@users.sourceforge.net>
parents: 47
diff changeset
431 # Storing only marshallable data in the db - no nasty pickled class references.
fa5aea4c212e Fixed offset handling (shoulda read the spec a little better)
Richard Jones <richard@users.sourceforge.net>
parents: 47
diff changeset
432 #
47
34491d9b91a0 Storing only marshallable data in the db - no nasty pickled class references.
Richard Jones <richard@users.sourceforge.net>
parents: 26
diff changeset
433 # Revision 1.2 2001/07/22 12:09:32 richard
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Richard Jones <richard@users.sourceforge.net>
parents: 26
diff changeset
434 # Final commit of Grande Splite
34491d9b91a0 Storing only marshallable data in the db - no nasty pickled class references.
Richard Jones <richard@users.sourceforge.net>
parents: 26
diff changeset
435 #
26
c7c14960f413 Final commit of Grande Splite
Richard Jones <richard@users.sourceforge.net>
parents: 25
diff changeset
436 # Revision 1.1 2001/07/22 11:58:35 richard
c7c14960f413 Final commit of Grande Splite
Richard Jones <richard@users.sourceforge.net>
parents: 25
diff changeset
437 # More Grande Splite
25
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parents:
diff changeset
438 #
127
0791d13baea7 Added vim command to all source so that we don't get no steenkin' tabs :)
Richard Jones <richard@users.sourceforge.net>
parents: 75
diff changeset
439 #
0791d13baea7 Added vim command to all source so that we don't get no steenkin' tabs :)
Richard Jones <richard@users.sourceforge.net>
parents: 75
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Roundup Issue Tracker: http://roundup-tracker.org/