Tool to convert Python code to be PEP8 compliant

I know there are tools which validate whether your Python code is compliant with PEP8, for example there is both an online service and a python module.

However, I cannot find a service or module which can convert my Python file to a self-contained, PEP8 valid Python file. Does anyone know if there are any?
I assume it's feasible since PEP8 is all about the appearance of the code, right?

Solution

Unfortunately "pep8 storming" (the entire project) has several negative side-effects:

lots of merge-conflicts
break git blame
make code review difficult

As an alternative (and thanks to @y-p for the idea), I wrote a small package which autopep8s only those lines which you have been working on since the last commit/branch:

Basically leaving the project a little better than you found it:

pip install pep8radius

Suppose you've done your work off of master and are ready to commit:

# be somewhere in your project directory
# see the diff with pep, see the changes you've made since master
pep8radius master --diff
# make those changes
pep8radius master --diff --in-place

Or to clean the new lines you've commited since the last commit:

pep8radius --diff
pep8radius --diff --in-place

# the lines which changed since a specific commit `git diff 98f51f`
pep8radius 98f51f --diff

Basically pep8radius is applying autopep8 to lines in the output of git/hg diff (from the last shared commit).

This script currently works with git and hg, if your using something else and want this to work please post a comment/issue/PR!