http://code.activestate.com/recipes/tags/comparison/popular/2016-03-28T21:36:31-07:00ActiveState Code Recipes2016-03-26T18:31:11-07:00Vasudev Ramhttp://code.activestate.com/recipes/users/4173351/http://code.activestate.com/recipes/580631-file-comparison-utility-in-python/

<p style="color: grey"> Python recipe 580631 by <a href="/recipes/users/4173351/">Vasudev Ram</a> (<a href="/recipes/tags/commandline/">commandline</a>, <a href="/recipes/tags/comparison/">comparison</a>, <a href="/recipes/tags/file/">file</a>, <a href="/recipes/tags/files/">files</a>, <a href="/recipes/tags/linux/">linux</a>, <a href="/recipes/tags/python/">python</a>, <a href="/recipes/tags/unix/">unix</a>, <a href="/recipes/tags/utilities/">utilities</a>). </p> <p>This is a recipe to compare any two files via a Python command-line program. It is like a basic version of the cmp command of Unix or the fc.exe (file compare) command of Windows.</p>

2016-03-28T21:36:31-07:00Vasudev Ramhttp://code.activestate.com/recipes/users/4173351/http://code.activestate.com/recipes/580632-python-one-liner-to-compare-two-files/

<p style="color: grey"> Python recipe 580632 by <a href="/recipes/users/4173351/">Vasudev Ram</a> (<a href="/recipes/tags/comparison/">comparison</a>, <a href="/recipes/tags/file/">file</a>, <a href="/recipes/tags/files/">files</a>, <a href="/recipes/tags/programming/">programming</a>, <a href="/recipes/tags/python/">python</a>). </p> <p>As the title says ...</p> <p>It prints True if the files compared are the same, and False if they differ (either in size or in content).</p>

2012-06-06T12:00:52-07:00Charlie Clarkhttp://code.activestate.com/recipes/users/4171013/http://code.activestate.com/recipes/578158-range-comparison/

<p style="color: grey"> Python recipe 578158 by <a href="/recipes/users/4171013/">Charlie Clark</a> (<a href="/recipes/tags/case/">case</a>, <a href="/recipes/tags/comparison/">comparison</a>, <a href="/recipes/tags/switch/">switch</a>, <a href="/recipes/tags/ternary/">ternary</a>). </p> <p>Although Python now has something similar to ternary operator with the result if ... else other result construction and this allows chaining (adding additional conditions on the if side, this soon becomes unreadable. A common use case is to filter values by ranges so I wrote the following when porting some code from PHP once I found I no longer understand the logic for a simple three-way filter.</p>

2011-04-08T07:26:45-07:00Denis Gorodetskiyhttp://code.activestate.com/recipes/users/4177587/http://code.activestate.com/recipes/577645-a-script-evaluating-psnr-metric-of-two-yuv420-fram/

<p style="color: grey"> Python recipe 577645 by <a href="/recipes/users/4177587/">Denis Gorodetskiy</a> (<a href="/recipes/tags/comparison/">comparison</a>, <a href="/recipes/tags/difference/">difference</a>, <a href="/recipes/tags/frame/">frame</a>, <a href="/recipes/tags/metric/">metric</a>, <a href="/recipes/tags/psnr/">psnr</a>, <a href="/recipes/tags/video/">video</a>, <a href="/recipes/tags/yuv/">yuv</a>). Revision 2. </p> <p>A script evaluating PSNR metric of two YUV420 frames <strong>usage: psnr.py filename1.yuv filename2.yuv frame_width frame_height</strong></p> <p>Alternatively if filename1 contains width and height in the form <strong>file-1200x1600.yuv</strong>, the script will extract width and height of a frame from the filename. Then usage even simplier: <strong>psnr.py filename1-1200x1600.yuv filename2.yuv</strong></p>

2016-02-11T17:31:39-08:00Jice Clavierhttp://code.activestate.com/recipes/users/4089467/http://code.activestate.com/recipes/576589-compare-mysql-db/

<p style="color: grey"> Python recipe 576589 by <a href="/recipes/users/4089467/">Jice Clavier</a> (<a href="/recipes/tags/compare/">compare</a>, <a href="/recipes/tags/comparison/">comparison</a>, <a href="/recipes/tags/database/">database</a>, <a href="/recipes/tags/mysql/">mysql</a>). Revision 3. </p> <p>Small module to and check for differences between 2 DB.</p> <p>It will compare the table list, the tables structure and their content.</p> <p>When you run the program, you are ask if you want a detailed comparison. As global comparison will list all the different tables, detailed comparison will output every different record (and will take longer to run)</p>

2008-10-28T11:54:42-07:00Michael Foordhttp://code.activestate.com/recipes/users/2183852/http://code.activestate.com/recipes/576529-total-ordering-class-decorator-for-filling-in-rich/

<p style="color: grey"> Python recipe 576529 by <a href="/recipes/users/2183852/">Michael Foord</a> (<a href="/recipes/tags/class_decorator/">class_decorator</a>, <a href="/recipes/tags/comparison/">comparison</a>, <a href="/recipes/tags/decorator/">decorator</a>, <a href="/recipes/tags/ordering/">ordering</a>, <a href="/recipes/tags/sorting/">sorting</a>). Revision 5. </p> <p><code>total_ordering</code> and <code>force_total_ordering</code> are class decorators for Python 2.6 &amp; Python 3.</p> <p>They provides <em>all</em> the rich comparison methods on a class by defining <em>any</em> one of '__lt__', '__gt__', '__le__', '__ge__'.</p> <p><code>total_ordering</code> fills in all unimplemented rich comparison methods, assuming at least one is implemented. <code>__lt__</code> is taken as the base comparison method on which the others are built, but if that is not available it will be constructed from the first one found.</p> <p><code>force_total_ordering</code> does the same, but having taken a comparison method as the base it fills in <em>all</em> the others - this overwrites additional comparison methods that may be implemented, guaranteeing consistent comparison semantics.</p>