[Python] Why does PyCharm use 120 Character Lines even though PEP8 Specifies 79?

PEP8 clearly specifies 79 characters, however, PyCharm defaults to 120 and gives me the warning "PEP8: line too long (... > 120 characters)".

Did previous versions of PEP8 use 120 and PyCharm not update its PEP8 checker? I couldn't find any previous versions of the PEP8 Guide, however, I can easily find previous version of the PEP8 Python scripts.

I'm starting a new Python project and I'm not sure which to use.

References:

http://legacy.python.org/dev/peps/pep-0008/

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