Utility to fix Python import style?

Question

We have a lot of files with ugly import statements like this:

from project.foo import a, b
from project.foo import c
from project.bar import d, e, f, g

Does there exist something that will change them all to one import per line?

from project.foo import a
from project.foo import b
from project.foo import c
from project.bar import d
from project.bar import e
from project.bar import f
from project.bar import g

Clarification: The reason for this is to maintain a consistent style, like Google's style guide for Python.

I agree with JBernardo. I do java at work and I hate this. Unnecessary junk. — zengr
– zengr, Commented Oct 7, 2011 at 20:41
I appreciate all the sentiment. You have convinced me! However, I'll leave this question in the case that someone really wants to do what I asked. — a paid nerd
– a paid nerd, Commented Oct 9, 2011 at 4:36
I would be more useful to have a utility that fixes from foo import * to from foo import a, b. — fmalina
– fmalina, Commented Aug 22, 2015 at 9:17

zengr · Accepted Answer · 2011-10-07 20:32:58Z

7

As per PEP8 style guide:

Imports

- Imports should usually be on separate lines, e.g.:

    Yes: import os
         import sys

    No:  import sys, os

  it's okay to say this though:

    from subprocess import Popen, PIPE

So, I think you should be doing what you are and should not split them. I am not aware of any utility which will do that for you.

Also, if:

project.bar contains say: d,e,f,g,x,y,z then I would say just do a import project.bar, code will be much less and easy for the eyes.

edited Oct 7, 2011 at 20:32

answered Oct 7, 2011 at 20:27

zengr

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1 Comment

brandizzi Over a year ago

As a note, I would recommend the OP to import project.bar with import project.bar as bar and use bar.d, bar.e etc.

chown · Accepted Answer · 2011-10-07 20:37:54Z

0

sed can do that with something like this (test first as I don't have access to my Linux box to test it at the moment):

sed -i".backup" 's/from ([^ ]+) import ([^,]+), ([^,]+)/from \1 import \2\nfrom \1 import \3/' *.py

answered Oct 7, 2011 at 20:37

chown

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1 Comment

a paid nerd Over a year ago

Hmm: sed: -e expression #1, char 76: invalid reference \3 on s' command's RHS`

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