Naming "with open" Variable

Python''s "with" statement is great for resource handling. However I find my self struggling with naming (and naming is important) the context manager variable.

When you write "with open(''/path/to/somethere'') as X", what''s the best name for X? In some cases it''s obvious, but in most cases I find myself using the generic "fo" (stands for "file object").

I decided to run a little script on Python''s 3.4 Lib directory and find out what is the most common name. Here are the results:

Seems like f is the most common, but I really don''t like single letter variables. I''ll go with the 2nd place - fp.

Here''s the script used to generate this chart: