How do I get Pyflakes to ignore a statement?

Question

A lot of our modules start with:

try:
    import json
except ImportError:
    from django.utils import simplejson as json  # Python 2.4 fallback.


        

Answer 1

Here is a monkey patch for pyflakes that adds a # bypass_pyflakes comment option.

bypass_pyflakes.py

#!/usr/bin/env python

from pyflakes.scripts import pyflakes
from pyflakes.checker import Checker


def report_with_bypass(self, messageClass, *args, **kwargs):
    text_lineno = args[0] - 1
    with open(self.filename, 'r') as code:
        if code.readlines()[text_lineno].find('bypass_pyflakes') >= 0:
            return
    self.messages.append(messageClass(self.filename, *args, **kwargs))

# monkey patch checker to support bypass
Checker.report = report_with_bypass

pyflakes.main()

If you save this as bypass_pyflakes.py, then you can invoke it as python bypass_pyflakes.py myfile.py.

http://chase-seibert.github.com/blog/2013/01/11/bypass_pyflakes.html