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<h1>leancloud.geo_point 源代码</h1><div class="highlight"><pre>
<span></span><span class="c1"># coding: utf-8</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">absolute_import</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">division</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">print_function</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">unicode_literals</span>
<span class="kn">import</span> <span class="nn">math</span>
<span class="n">__author__</span> <span class="o">=</span> <span class="s2">"asaka <lan@leancloud.rocks>"</span>
<div class="viewcode-block" id="GeoPoint"><a class="viewcode-back" href="../../index.html#leancloud.GeoPoint">[文档]</a><span class="k">class</span> <span class="nc">GeoPoint</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">latitude</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">longitude</span><span class="o">=</span><span class="mi">0</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> :param latitude: 纬度</span>
<span class="sd"> :type latitude: int or float</span>
<span class="sd"> :param longitude: 经度</span>
<span class="sd"> :type longitude: int or float</span>
<span class="sd"> :return: GeoPoint</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate</span><span class="p">(</span><span class="n">latitude</span><span class="p">,</span> <span class="n">longitude</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_latitude</span> <span class="o">=</span> <span class="n">latitude</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_longitude</span> <span class="o">=</span> <span class="n">longitude</span>
<span class="nd">@classmethod</span>
<span class="k">def</span> <span class="nf">_validate</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">latitude</span><span class="p">,</span> <span class="n">longitude</span><span class="p">):</span>
<span class="k">if</span> <span class="n">latitude</span> <span class="o"><</span> <span class="o">-</span><span class="mf">90.0</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"GeoPoint latitude </span><span class="si">{0}</span><span class="s2"> < -90.0"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">latitude</span><span class="p">))</span>
<span class="k">if</span> <span class="n">latitude</span> <span class="o">></span> <span class="mf">90.0</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"GeoPoint latitude </span><span class="si">{0}</span><span class="s2"> > 90.0"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">latitude</span><span class="p">))</span>
<span class="k">if</span> <span class="n">longitude</span> <span class="o"><</span> <span class="o">-</span><span class="mf">180.0</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"GeoPoint longitude </span><span class="si">{0}</span><span class="s2"> < -180.0"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">longitude</span><span class="p">))</span>
<span class="k">if</span> <span class="n">longitude</span> <span class="o">></span> <span class="mf">180.0</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"GeoPoint longitude </span><span class="si">{0}</span><span class="s2"> > 180.0"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">longitude</span><span class="p">))</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">latitude</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> 当前对象的纬度</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_latitude</span>
<span class="nd">@latitude</span><span class="o">.</span><span class="n">setter</span>
<span class="k">def</span> <span class="nf">latitude</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">latitude</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate</span><span class="p">(</span><span class="n">latitude</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">longitude</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_latitude</span> <span class="o">=</span> <span class="n">latitude</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">longitude</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> 当前对象的经度</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_longitude</span>
<span class="nd">@longitude</span><span class="o">.</span><span class="n">setter</span>
<span class="k">def</span> <span class="nf">longitude</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">longitude</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">latitude</span><span class="p">,</span> <span class="n">longitude</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_longitude</span> <span class="o">=</span> <span class="n">longitude</span>
<div class="viewcode-block" id="GeoPoint.dump"><a class="viewcode-back" href="../../index.html#leancloud.GeoPoint.dump">[文档]</a> <span class="k">def</span> <span class="nf">dump</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">latitude</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">longitude</span><span class="p">)</span>
<span class="k">return</span> <span class="p">{</span>
<span class="s2">"__type"</span><span class="p">:</span> <span class="s2">"GeoPoint"</span><span class="p">,</span>
<span class="s2">"latitude"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">latitude</span><span class="p">,</span>
<span class="s2">"longitude"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">longitude</span><span class="p">,</span>
<span class="p">}</span></div>
<div class="viewcode-block" id="GeoPoint.radians_to"><a class="viewcode-back" href="../../index.html#leancloud.GeoPoint.radians_to">[文档]</a> <span class="k">def</span> <span class="nf">radians_to</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Returns the distance from this GeoPoint to another in radians.</span>
<span class="sd"> :param other: point the other GeoPoint</span>
<span class="sd"> :type other: GeoPoint</span>
<span class="sd"> :rtype: float</span>
<span class="sd"> """</span>
<span class="n">d2r</span> <span class="o">=</span> <span class="n">math</span><span class="o">.</span><span class="n">pi</span> <span class="o">/</span> <span class="mf">180.0</span>
<span class="n">lat1rad</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">latitude</span> <span class="o">*</span> <span class="n">d2r</span>
<span class="n">long1rad</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">longitude</span> <span class="o">*</span> <span class="n">d2r</span>
<span class="n">lat2rad</span> <span class="o">=</span> <span class="n">other</span><span class="o">.</span><span class="n">latitude</span> <span class="o">*</span> <span class="n">d2r</span>
<span class="n">long2rad</span> <span class="o">=</span> <span class="n">other</span><span class="o">.</span><span class="n">longitude</span> <span class="o">*</span> <span class="n">d2r</span>
<span class="n">delta_lat</span> <span class="o">=</span> <span class="n">lat1rad</span> <span class="o">-</span> <span class="n">lat2rad</span>
<span class="n">delta_long</span> <span class="o">=</span> <span class="n">long1rad</span> <span class="o">-</span> <span class="n">long2rad</span>
<span class="n">sin_delta_lat_div2</span> <span class="o">=</span> <span class="n">math</span><span class="o">.</span><span class="n">sin</span><span class="p">(</span><span class="n">delta_lat</span> <span class="o">/</span> <span class="mf">2.0</span><span class="p">)</span>
<span class="n">sin_delta_long_div2</span> <span class="o">=</span> <span class="n">math</span><span class="o">.</span><span class="n">sin</span><span class="p">(</span><span class="n">delta_long</span> <span class="o">/</span> <span class="mf">2.0</span><span class="p">)</span>
<span class="n">a</span> <span class="o">=</span> <span class="p">(</span><span class="n">sin_delta_lat_div2</span> <span class="o">*</span> <span class="n">sin_delta_lat_div2</span><span class="p">)</span> <span class="o">+</span> <span class="p">(</span>
<span class="n">math</span><span class="o">.</span><span class="n">cos</span><span class="p">(</span><span class="n">lat1rad</span><span class="p">)</span>
<span class="o">*</span> <span class="n">math</span><span class="o">.</span><span class="n">cos</span><span class="p">(</span><span class="n">lat2rad</span><span class="p">)</span>
<span class="o">*</span> <span class="n">sin_delta_long_div2</span>
<span class="o">*</span> <span class="n">sin_delta_long_div2</span>
<span class="p">)</span>
<span class="n">a</span> <span class="o">=</span> <span class="nb">min</span><span class="p">(</span><span class="mf">1.0</span><span class="p">,</span> <span class="n">a</span><span class="p">)</span>
<span class="k">return</span> <span class="mi">2</span> <span class="o">*</span> <span class="n">math</span><span class="o">.</span><span class="n">asin</span><span class="p">(</span><span class="n">math</span><span class="o">.</span><span class="n">sqrt</span><span class="p">(</span><span class="n">a</span><span class="p">))</span></div>
<div class="viewcode-block" id="GeoPoint.kilometers_to"><a class="viewcode-back" href="../../index.html#leancloud.GeoPoint.kilometers_to">[文档]</a> <span class="k">def</span> <span class="nf">kilometers_to</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Returns the distance from this GeoPoint to another in kilometers.</span>
<span class="sd"> :param other: point the other GeoPoint</span>
<span class="sd"> :type other: GeoPoint</span>
<span class="sd"> :rtype: float</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">radians_to</span><span class="p">(</span><span class="n">other</span><span class="p">)</span> <span class="o">*</span> <span class="mf">6371.0</span></div>
<div class="viewcode-block" id="GeoPoint.miles_to"><a class="viewcode-back" href="../../index.html#leancloud.GeoPoint.miles_to">[文档]</a> <span class="k">def</span> <span class="nf">miles_to</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Returns the distance from this GeoPoint to another in miles.</span>
<span class="sd"> :param other: point the other GeoPoint</span>
<span class="sd"> :type other: GeoPoint</span>
<span class="sd"> :rtype: float</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">radians_to</span><span class="p">(</span><span class="n">other</span><span class="p">)</span> <span class="o">*</span> <span class="mf">3958.8</span></div>
<span class="k">def</span> <span class="fm">__eq__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="k">return</span> <span class="p">(</span>
<span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">GeoPoint</span><span class="p">)</span>
<span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">latitude</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">latitude</span>
<span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">longitude</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">longitude</span>
<span class="p">)</span></div>
</pre></div>
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