http://code.activestate.com/recipes/tags/save-money/2016-03-23T14:14:26-07:00ActiveState Code Recipes2016-03-23T14:14:26-07:00Steven D'Apranohttp://code.activestate.com/recipes/users/4172944/http://code.activestate.com/recipes/579097-safely-and-atomically-write-to-a-file/

<p style="color: grey"> Python recipe 579097 by <a href="/recipes/users/4172944/">Steven D'Aprano</a> (<a href="/recipes/tags/atomic/">atomic</a>, <a href="/recipes/tags/file/">file</a>, <a href="/recipes/tags/save/">save</a>). Revision 3. </p> <p>Saving the user's data is risky. If you write to a file directly, and an error occurs during the write, you may corrupt the file and lose the user's data. One approach to prevent this is to write to a temporary file, then only when you know the file has been written successfully, over-write the original. This function returns a context manager which can make this more convenient.</p> <p>Update: this now uses <code>os.replace</code> when available, and hopefully will work better on Windows.</p>

2010-10-28T12:03:52-07:00Campbell Bartonhttp://code.activestate.com/recipes/users/4168177/http://code.activestate.com/recipes/577443-write-a-png-image-in-native-python/

<p style="color: grey"> Python recipe 577443 by <a href="/recipes/users/4168177/">Campbell Barton</a> (<a href="/recipes/tags/alpha/">alpha</a>, <a href="/recipes/tags/image/">image</a>, <a href="/recipes/tags/pil/">pil</a>, <a href="/recipes/tags/png/">png</a>, <a href="/recipes/tags/save/">save</a>). </p> <p>This is a simple PNG writing function, intended to be as small as possible. It only supports RGBA 32bit PNGs and the input should be a buffer of rgba bytes.</p> <p>Tested for python 2 and 3.</p>