Use context manager to open/close file

[jdufresne]

No description provided.

[McSinyx]

Funny enough, the entire following snippet

def read(fname):
    inf = open(os.path.join(os.path.dirname(__file__), fname))
    out = "\n" + inf.read().replace("\r\n", "\n")
    inf.close()
    return out

# Do not import `appdirs` yet, lest we import some random version on sys.path.
for line in read("appdirs.py").splitlines():
    if line.startswith("__version__"):
        version = ast.literal_eval(line.split("=", 1)[1].strip())
        break

can be replaced by simply

import re

# TBH I have no idea what does ``lest'' mean
# Do not import `appdirs` yet, lest we import some random version on sys.path.
with open("appdirs.py") as source:
    ast.literal_eval(re.search('^__version__[ \t\f]*=(.*)$', source.read()).group(1))

[pradyunsg]

I have no idea what does ''lest'' mean

to avoid the risk of, in order to avoid, just in case