Fix Python 3.x compatibility

EmlynC commented 7 years ago

oauth2_client.py has some Python 2 syntax that is causing the module to fail when imported in Python 3.6 as referenced in issue #29 and #30. This is fixed by running 2to3 over oauth2_client.py and then correcting one things that 2to3 didn't catch — os.open expects a string for file mode rather than a unix mode octal.

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EmlynC commented 7 years ago

I signed it!

googlebot commented 7 years ago

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