http://code.activestate.com/recipes/users/118800/2004-06-18T10:57:33-07:00ActiveState Code Recipes2004-06-14T09:56:27-07:00Sami Hangaslammihttp://code.activestate.com/recipes/users/118800/http://code.activestate.com/recipes/286134-safe-expression-evaluation/

<p style="color: grey"> Python recipe 286134 by <a href="/recipes/users/118800/">Sami Hangaslammi</a> (<a href="/recipes/tags/programs/">programs</a>). Revision 3. </p> <p>Often, we might want to let (untrusted) users input simple Python expressions and evaluate them, but the eval-function in Python is unsafe. The restricted execution model in the rexec module is deprecated, so we need another way ensure only "safe" expressions will be evaluted: analyzing bytecodes.</p>

2004-06-18T10:57:33-07:00Sami Hangaslammihttp://code.activestate.com/recipes/users/118800/http://code.activestate.com/recipes/286147-function-decorators-by-hacking-bytecodes/

<p style="color: grey"> Python recipe 286147 by <a href="/recipes/users/118800/">Sami Hangaslammi</a> (<a href="/recipes/tags/programs/">programs</a>). Revision 2. </p> <p>Wether or not PEP 318 makes it to Python 2.4, you can experiment with an alternative decorator syntax in Python 2.3 by hacking with bytecodes.</p>

2004-05-21T13:13:35-07:00Sami Hangaslammihttp://code.activestate.com/recipes/users/118800/http://code.activestate.com/recipes/284742-finding-out-the-number-of-values-the-caller-is-exp/

<p style="color: grey"> Python recipe 284742 by <a href="/recipes/users/118800/">Sami Hangaslammi</a> (<a href="/recipes/tags/shortcuts/">shortcuts</a>). Revision 4. </p> <p>Sometimes you might want to make a function behave differently if the caller is expecting one or several values (e.g. x=func() versus x,y=func()). The expecting() function lets the function implementer find out how many values the caller wants as a function result.</p>

2001-07-23T05:50:04-07:00Sami Hangaslammihttp://code.activestate.com/recipes/users/118800/http://code.activestate.com/recipes/66315-case-insensitive-dictionary/

<p style="color: grey"> Python recipe 66315 by <a href="/recipes/users/118800/">Sami Hangaslammi</a> (<a href="/recipes/tags/algorithms/">algorithms</a>). </p> <p>A dictionary that has case-insensitive keys.</p>

2001-07-25T15:04:51-07:00Sami Hangaslammihttp://code.activestate.com/recipes/users/118800/http://code.activestate.com/recipes/66426-readwritelock/

<p style="color: grey"> Python recipe 66426 by <a href="/recipes/users/118800/">Sami Hangaslammi</a> (<a href="/recipes/tags/threads/">threads</a>). </p> <p>A lock object that allows many simultaneous "read-locks", but only one "write-lock".</p>

2001-07-30T19:30:23-07:00Sami Hangaslammihttp://code.activestate.com/recipes/users/118800/http://code.activestate.com/recipes/66448-iterator-utilities/

<p style="color: grey"> Python recipe 66448 by <a href="/recipes/users/118800/">Sami Hangaslammi</a> (<a href="/recipes/tags/algorithms/">algorithms</a>). Revision 2. </p> <p>A collection of small utility functions for iterators (all functions can also be used with normal sequences). Among other things, the module provides generator ("lazy") versions of the built-in sequence-manipulation functions. The generators can be combined to produce a more specialised iterator.</p>

2001-07-09T05:05:29-07:00Sami Hangaslammihttp://code.activestate.com/recipes/users/118800/http://code.activestate.com/recipes/66009-converting-between-different-naming-convetions/

<p style="color: grey"> Python recipe 66009 by <a href="/recipes/users/118800/">Sami Hangaslammi</a> (<a href="/recipes/tags/text/">text</a>). </p> <p>These short functions convert identifier names between the most common naming conventions: CapitalizedWords, mixedCase and under_scores.</p>