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Question Ranking
Pros
Pro Very fast
Because it looks for errors from a small group of possible mistakes, pyflakes is very fast. When dealing with many lines of code this is a very useful feature. When used in conjunction with an IDE, it checks the code as it's being edited.
Pro Easy installation
The installation process for pyflakes is as easy as it can be. Can be installed with easy_install or pip and you are ready to go.
Cons
Con Not very powerful
Pyflakes only checks for names that are defined but never used or names that are redefined without being used. It also does not have command line options that offer a degree of control for the tests that you are running.
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