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+ <h1>Source code for nepi.util.timefuncs</h1><div class="highlight"><pre>
+<span class="c">#</span>
+<span class="c"># NEPI, a framework to manage network experiments</span>
+<span class="c"># Copyright (C) 2013 INRIA</span>
+<span class="c">#</span>
+<span class="c"># This program is free software: you can redistribute it and/or modify</span>
+<span class="c"># it under the terms of the GNU General Public License version 2 as</span>
+<span class="c"># published by the Free Software Foundation;</span>
+<span class="c">#</span>
+<span class="c"># This program is distributed in the hope that it will be useful,</span>
+<span class="c"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
+<span class="c"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
+<span class="c"># GNU General Public License for more details.</span>
+<span class="c">#</span>
+<span class="c"># You should have received a copy of the GNU General Public License</span>
+<span class="c"># along with this program. If not, see <http://www.gnu.org/licenses/>.</span>
+<span class="c">#</span>
+<span class="c"># Author: Alina Quereilhac <alina.quereilhac@inria.fr></span>
+
+
+<span class="kn">import</span> <span class="nn">datetime</span>
+<span class="kn">import</span> <span class="nn">re</span>
+
+<span class="n">_strf</span> <span class="o">=</span> <span class="s">"%Y%m</span><span class="si">%d</span><span class="s">%H%M%S</span><span class="si">%f</span><span class="s">"</span>
+<span class="n">_reabs</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="s">"^\d{20}$"</span><span class="p">)</span>
+<span class="n">_rerel</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="s">"^(?P<time>\d+(.\d+)?)(?P<units>h|m|s|ms|us)$"</span><span class="p">)</span>
+
+<span class="c"># Work around to fix "ImportError: Failed to import _strptime because the import lock is held by another thread."</span>
+<span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">strptime</span><span class="p">(</span><span class="s">"20120807124732894211"</span><span class="p">,</span> <span class="n">_strf</span><span class="p">)</span>
+
+<div class="viewcode-block" id="stformat"><a class="viewcode-back" href="../../../_layout/nepi.util.html#nepi.util.timefuncs.stformat">[docs]</a><span class="k">def</span> <span class="nf">stformat</span><span class="p">(</span><span class="n">sdate</span><span class="p">):</span>
+ <span class="sd">""" Constructs a datetime object from a string date with</span>
+<span class="sd"> format YYYYMMddHHMMSSffff </span>
+
+<span class="sd"> """</span>
+ <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">strptime</span><span class="p">(</span><span class="n">sdate</span><span class="p">,</span> <span class="n">_strf</span><span class="p">)</span><span class="o">.</span><span class="n">date</span><span class="p">()</span>
+</div>
+<div class="viewcode-block" id="tsformat"><a class="viewcode-back" href="../../../_layout/nepi.util.html#nepi.util.timefuncs.tsformat">[docs]</a><span class="k">def</span> <span class="nf">tsformat</span><span class="p">(</span><span class="n">date</span> <span class="o">=</span> <span class="bp">None</span><span class="p">):</span>
+ <span class="sd">""" Formats a datetime object to a string with format YYYYMMddHHMMSSffff.</span>
+<span class="sd"> If no date is given, the current date is used.</span>
+<span class="sd"> </span>
+<span class="sd"> """</span>
+ <span class="k">if</span> <span class="ow">not</span> <span class="n">date</span><span class="p">:</span>
+ <span class="n">date</span> <span class="o">=</span> <span class="n">tnow</span><span class="p">()</span>
+
+ <span class="k">return</span> <span class="n">date</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="n">_strf</span><span class="p">)</span>
+</div>
+<div class="viewcode-block" id="tnow"><a class="viewcode-back" href="../../../_layout/nepi.util.html#nepi.util.timefuncs.tnow">[docs]</a><span class="k">def</span> <span class="nf">tnow</span><span class="p">():</span>
+ <span class="sd">""" Returns datetime object with the current time """</span>
+ <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">now</span><span class="p">()</span>
+</div>
+<div class="viewcode-block" id="tdiff"><a class="viewcode-back" href="../../../_layout/nepi.util.html#nepi.util.timefuncs.tdiff">[docs]</a><span class="k">def</span> <span class="nf">tdiff</span><span class="p">(</span><span class="n">date1</span><span class="p">,</span> <span class="n">date2</span><span class="p">):</span>
+ <span class="sd">""" Returns difference ( date1 - date2 ) as a datetime object,</span>
+<span class="sd"> where date1 and date 2 are datetime objects </span>
+<span class="sd"> </span>
+<span class="sd"> """</span>
+ <span class="k">return</span> <span class="n">date1</span> <span class="o">-</span> <span class="n">date2</span>
+</div>
+<span class="k">def</span> <span class="nf">_get_total_seconds</span><span class="p">(</span><span class="n">td</span><span class="p">):</span>
+ <span class="k">return</span> <span class="p">(</span><span class="n">td</span><span class="o">.</span><span class="n">microseconds</span> <span class="o">+</span> <span class="p">(</span><span class="n">td</span><span class="o">.</span><span class="n">seconds</span> <span class="o">+</span> <span class="n">td</span><span class="o">.</span><span class="n">days</span> <span class="o">*</span> <span class="mi">24</span> <span class="o">*</span> <span class="mi">3600</span><span class="p">)</span> <span class="o">*</span> <span class="mf">1e6</span><span class="p">)</span> <span class="o">/</span> <span class="mf">1e6</span>
+
+<div class="viewcode-block" id="tdiffsec"><a class="viewcode-back" href="../../../_layout/nepi.util.html#nepi.util.timefuncs.tdiffsec">[docs]</a><span class="k">def</span> <span class="nf">tdiffsec</span><span class="p">(</span><span class="n">date1</span><span class="p">,</span> <span class="n">date2</span><span class="p">):</span>
+ <span class="sd">""" Returns the date difference ( date1 - date2 ) in seconds,</span>
+<span class="sd"> where date1 and date 2 are datetime objects </span>
+<span class="sd"> </span>
+<span class="sd"> """</span>
+ <span class="n">diff</span> <span class="o">=</span> <span class="n">tdiff</span><span class="p">(</span><span class="n">date1</span><span class="p">,</span> <span class="n">date2</span><span class="p">)</span>
+ <span class="k">return</span> <span class="n">_get_total_seconds</span><span class="p">(</span><span class="n">diff</span><span class="p">)</span>
+</div>
+<div class="viewcode-block" id="stabsformat"><a class="viewcode-back" href="../../../_layout/nepi.util.html#nepi.util.timefuncs.stabsformat">[docs]</a><span class="k">def</span> <span class="nf">stabsformat</span><span class="p">(</span><span class="n">sdate</span><span class="p">,</span> <span class="n">dbase</span> <span class="o">=</span> <span class="bp">None</span><span class="p">):</span>
+ <span class="sd">""" Constructs a datetime object from a string date.</span>
+<span class="sd"> The string date can be expressed as an absolute date</span>
+<span class="sd"> ( i.e. format YYYYMMddHHMMSSffff ) or as a relative time</span>
+<span class="sd"> ( e.g. format '5m' or '10s'). </span>
+<span class="sd"> If the date is a relative time and the dbase parameter </span>
+<span class="sd"> is given (dbase must be datetime object), the returned</span>
+<span class="sd"> date will be dbase + sdate. If dbase is None, </span>
+<span class="sd"> current time will be used instead as base time.</span>
+
+<span class="sd"> :param date : string date </span>
+<span class="sd"> :type date : date </span>
+
+<span class="sd"> """</span>
+
+ <span class="c"># No date given, return current datetime</span>
+ <span class="k">if</span> <span class="ow">not</span> <span class="n">sdate</span><span class="p">:</span>
+ <span class="k">return</span> <span class="n">tnow</span><span class="p">()</span>
+
+ <span class="c"># Absolute date is given</span>
+ <span class="k">if</span> <span class="n">_reabs</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">sdate</span><span class="p">):</span>
+ <span class="k">return</span> <span class="n">stformat</span><span class="p">(</span><span class="n">sdate</span><span class="p">)</span>
+
+ <span class="c"># Relative time is given</span>
+ <span class="n">m</span> <span class="o">=</span> <span class="n">_rerel</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">sdate</span><span class="p">)</span>
+ <span class="k">if</span> <span class="n">m</span><span class="p">:</span>
+ <span class="n">time</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">m</span><span class="o">.</span><span class="n">groupdict</span><span class="p">()[</span><span class="s">'time'</span><span class="p">])</span>
+ <span class="n">units</span> <span class="o">=</span> <span class="n">m</span><span class="o">.</span><span class="n">groupdict</span><span class="p">()[</span><span class="s">'units'</span><span class="p">]</span>
+ <span class="k">if</span> <span class="n">units</span> <span class="o">==</span> <span class="s">'h'</span><span class="p">:</span>
+ <span class="n">delta</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">timedelta</span><span class="p">(</span><span class="n">hours</span> <span class="o">=</span> <span class="n">time</span><span class="p">)</span>
+ <span class="k">elif</span> <span class="n">units</span> <span class="o">==</span> <span class="s">'m'</span><span class="p">:</span>
+ <span class="n">delta</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">timedelta</span><span class="p">(</span><span class="n">minutes</span> <span class="o">=</span> <span class="n">time</span><span class="p">)</span>
+ <span class="k">elif</span> <span class="n">units</span> <span class="o">==</span> <span class="s">'s'</span><span class="p">:</span>
+ <span class="n">delta</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">timedelta</span><span class="p">(</span><span class="n">seconds</span> <span class="o">=</span> <span class="n">time</span><span class="p">)</span>
+ <span class="k">elif</span> <span class="n">units</span> <span class="o">==</span> <span class="s">'ms'</span><span class="p">:</span>
+ <span class="n">delta</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">timedelta</span><span class="p">(</span><span class="n">microseconds</span> <span class="o">=</span> <span class="p">(</span><span class="n">time</span><span class="o">*</span><span class="mi">1000</span><span class="p">))</span>
+ <span class="k">else</span><span class="p">:</span>
+ <span class="n">delta</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">timedelta</span><span class="p">(</span><span class="n">microseconds</span> <span class="o">=</span> <span class="n">time</span><span class="p">)</span>
+
+ <span class="k">if</span> <span class="ow">not</span> <span class="n">dbase</span><span class="p">:</span>
+ <span class="n">dbase</span> <span class="o">=</span> <span class="n">tnow</span><span class="p">()</span>
+
+ <span class="k">return</span> <span class="n">dbase</span> <span class="o">+</span> <span class="n">delta</span>
+
+ <span class="k">return</span> <span class="bp">None</span>
+</div>
+<div class="viewcode-block" id="compute_delay_ms"><a class="viewcode-back" href="../../../_layout/nepi.util.html#nepi.util.timefuncs.compute_delay_ms">[docs]</a><span class="k">def</span> <span class="nf">compute_delay_ms</span><span class="p">(</span><span class="n">timestamp2</span><span class="p">,</span> <span class="n">timestamp1</span><span class="p">):</span>
+ <span class="n">d1</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">fromtimestamp</span><span class="p">(</span><span class="nb">float</span><span class="p">(</span><span class="n">timestamp1</span><span class="p">))</span>
+ <span class="n">d2</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">fromtimestamp</span><span class="p">(</span><span class="nb">float</span><span class="p">(</span><span class="n">timestamp2</span><span class="p">))</span>
+ <span class="n">delay</span> <span class="o">=</span> <span class="n">d2</span> <span class="o">-</span> <span class="n">d1</span>
+
+ <span class="c"># round up resolution - round up to miliseconds</span>
+ <span class="k">return</span> <span class="n">delay</span><span class="o">.</span><span class="n">total_seconds</span><span class="p">()</span> <span class="o">*</span> <span class="mi">1000</span>
+</pre></div></div>
+
+ </div>
+ </div>
+ </div>
+ <div class="clearer"></div>
+ </div>
+ <div class="related">
+ <h3>Navigation</h3>
+ <ul>
+ <li class="right" style="margin-right: 10px">
+ <a href="../../../genindex.html" title="General Index"
+ >index</a></li>
+ <li class="right" >
+ <a href="../../../py-modindex.html" title="Python Module Index"
+ >modules</a> |</li>
+ <li><a href="../../../index.html">NEPI 3.0 documentation</a> »</li>
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