black inserts unnecessary whitespace around print() with target_version = py27

[rouge8]

black is adding whitespace between print and ( with --target-version py27.

Test file:

from __future__ import print_function

print("hello world")

Result:

$ black t.py --target-version py27 --diff
--- t.py	2019-03-14 22:09:34.902887 +0000
+++ t.py	2019-03-14 22:10:21.022372 +0000
@@ -1,4 +1,4 @@
 from __future__ import print_function

-print("hello world")
+print ("hello world")

reformatted t.py
All done! ✨ 🍰 ✨
1 file reformatted.

Operating system: OS X
Python version: 3.7.2
Black version: 19.3b0
Does also happen on master: yes

[ambv]

That's a bug, it's trying the non-print function grammar first. @JelleZijlstra :-)

[vbukhonov]

@ambv @JelleZijlstra
Hello. Sorry, but I am still facing this bug under python 3.

[chebee7i]

Can we get a release out for this? Trying to use the current release on 2.x is producing ugly code with these extra spaces.

[tommyjcarpenter]

Has this been switched to the stable branch? I am (per the vim instructions) using the latest stable version of black and I still hit this issue. I commented here: #988

It seems like the commit should be there: d6db1c1

However I am hitting this issue today (june 2020) with the latest stable black while editing python 2.7 code using let g:black_target_version=27 in vimrc

[vinyasmusic]

Facing this issue with Python 3.6
Black formats this piece of code print("cacheops.{} for {}".format(event, sender)) to print ("cacheops.{} for {}".format(event, sender))
And then the flake8 checker flags this under E211

[tommyjcarpenter]

I vote to reopen this issue. I do not think this is closed or resolved.

[cg-cnu]

Ran into this on V 19.10b0. Looks like the spaces after the print () are added if there is a print statement (print "test") in the code. Totally my mistake but thought it might save others some hair.