In python, how do I exclude files from a loop if they begin with a specific set of letters?

In python, how do I exclude files from a loop if they begin with a
specific set of letters?



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2.What's New in Python 2.7 — Python 3.4.0rc1 documentation

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Description:Building and Distributing Packages with Setuptools ¶
Setuptools is a collection of enhancements to the Python distutils (for
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6.MacPorts Guide

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