http://code.activestate.com/recipes/tags/order/views/2013-09-24T12:43:31-07:00ActiveState Code Recipes2012-04-24T10:49:00-07:00Sachin Joglekarhttp://code.activestate.com/recipes/users/4181845/http://code.activestate.com/recipes/578108-determinant-of-matrix-of-any-order/

<p style="color: grey"> Python recipe 578108 by <a href="/recipes/users/4181845/">Sachin Joglekar</a> (<a href="/recipes/tags/algebra/">algebra</a>, <a href="/recipes/tags/determinant/">determinant</a>, <a href="/recipes/tags/matrix/">matrix</a>, <a href="/recipes/tags/order/">order</a>). </p> <p>A small snipet of code to find the determinant of a mtrix of any order.Input must be a list like [[1,2,3],[4,5,6],[7,8,9]] (for a matrix of order 3). Works fine.</p>

2013-09-24T12:43:31-07:00Rutger Saalminkhttp://code.activestate.com/recipes/users/4187940/http://code.activestate.com/recipes/578672-sort-images-from-different-sources-by-picture-take/

<p style="color: grey"> Python recipe 578672 by <a href="/recipes/users/4187940/">Rutger Saalmink</a> (<a href="/recipes/tags/chronological/">chronological</a>, <a href="/recipes/tags/exif/">exif</a>, <a href="/recipes/tags/image/">image</a>, <a href="/recipes/tags/order/">order</a>, <a href="/recipes/tags/photo/">photo</a>, <a href="/recipes/tags/picture/">picture</a>). Revision 3. </p> <p>On some occasions/events, pictures will be taken by different camera's, mobile phones, etc. In order to sort these photos chronologically, it does not suffice using the file's date modified/created set by the OS. The following script obtains, from multiple sources, the pictures' taken date stored in the accompanying Exif data and outputs them all chronologically in a single directory.</p>

2008-08-01T19:24:34-07:00Orri Ganelhttp://code.activestate.com/recipes/users/2259404/http://code.activestate.com/recipes/576403-arbitrary-order-attribute-writing-with-elementtree/

<p style="color: grey"> Python recipe 576403 by <a href="/recipes/users/2259404/">Orri Ganel</a> (<a href="/recipes/tags/attribute/">attribute</a>, <a href="/recipes/tags/element/">element</a>, <a href="/recipes/tags/elementtree/">elementtree</a>, <a href="/recipes/tags/element_tree/">element_tree</a>, <a href="/recipes/tags/etree/">etree</a>, <a href="/recipes/tags/order/">order</a>, <a href="/recipes/tags/sort/">sort</a>, <a href="/recipes/tags/write/">write</a>, <a href="/recipes/tags/writing/">writing</a>, <a href="/recipes/tags/xml/">xml</a>). Revision 5. </p> <p>Modified version of ElementTree with two additional parameters to the write() method: "sortflag" and "sortcmp". "sortflag" defaults to "default", which results in unmodified behavior. "sortcmp" defaults to None, which results in unmodified behavior. See discussion for usage and justification. Changes made begin on line 655.</p> <p>EDIT: in most cases, unless sortflag happened to be intended for the root, it would be ignored; added sortflag and sortcmp to self._write() call on line 724. Expect another revision in the near future to allow for specifying different orders for different xml tags.</p> <p>EDIT, the second: Added tag-specific ordering.</p>

2011-06-11T08:31:09-07:00Steven D'Apranohttp://code.activestate.com/recipes/users/4172944/http://code.activestate.com/recipes/577748-calculate-the-mro-of-a-class/

<p style="color: grey"> Python recipe 577748 by <a href="/recipes/users/4172944/">Steven D'Aprano</a> (<a href="/recipes/tags/c3/">c3</a>, <a href="/recipes/tags/classes/">classes</a>, <a href="/recipes/tags/method/">method</a>, <a href="/recipes/tags/mro/">mro</a>, <a href="/recipes/tags/order/">order</a>, <a href="/recipes/tags/resolution/">resolution</a>). </p> <p>This function allows you to calculate the Method Resolution Order (MRO, or sometimes linearization) of a class or base classes. This is the so-called "C3" algorithm, as used by Python (new-style classes, from version 2.3 and higher). The MRO is the order of base classes that Python uses to search for methods and attributes. For single inheritance, the MRO is obvious and straight-forward and not very exciting, but for multiple inheritance it's not always obvious what the MRO should be.</p>