No module named 'regex._regex'; 'regex' is not a package

[jonasrk]

Traceback (most recent call last):
File "/usr/local/bin/black", line 5, in
from black import patched_main
File "/usr/local/lib/python3.8/site-packages/black.py", line 15, in
import regex as re
File "/usr/local/lib/python3.8/site-packages/regex.py", line 402, in
import _regex_core
File "/usr/local/lib/python3.8/site-packages/_regex_core.py", line 21, in
import regex._regex as _regex
ModuleNotFoundError: No module named 'regex._regex'; 'regex' is not a package

[daviddavis]

I'm hitting the same thing. I can reproduce this without black too just by opening a repl:

>>> import regex as re
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/pulp/lib64/python3.7/site-packages/regex.py", line 402, in <module>
    import _regex_core
  File "/usr/local/lib/pulp/lib64/python3.7/site-packages/_regex_core.py", line 21, in <module>
    import regex._regex as _regex
ModuleNotFoundError: No module named 'regex._regex'; 'regex' is not a package

[jonasrk]

@daviddavis So it's the fault of https://pypi.org/project/regex/ ?

Update: I've created https://bitbucket.org/mrabarnett/mrab-regex/issues/349/no-module-named-regex_regex-regex-is-not-a - just in case.

[daviddavis]

Yea, if I pin regex==2019.11.1, everything works fine. So I think it's regex 2019.12.9.

[bavedarnow]

Looks like they were doing some work recently that may have caused this: https://bitbucket.org/mrabarnett/mrab-regex/commits/all

Black isn't pinned to any specific version of regex: https://github.com/psf/black/blob/master/setup.py#L72

[mikegrima]

Seeing this now with moto: https://travis-ci.org/spulec/moto/jobs/625868515?utm_medium=notification&utm_source=github_status

[TomFaulkner]

Will there be a release for this fix? Timeframe?

If not I can pin the requirement in my team's requirements file, just want to know whether I should or just wait a bit.

[basnijholt]

Getting the same thing on Azure.

Anyone knows what changed?

Seems like a new patch release of black is needed.

Edit: according to the author of regex its

The Linux wheels are a result of issue #343.

[vilhelmprytz]

Also have the same issue. What happened?

[VolodymyrPavliukevych]

Have the same on Google Cloud App engine

[TomFaulkner]

Also have the same issue. What happened?

regex isn't pinned to a particular version. Apparently something in that library changed with their most recent release.

[JelleZijlstra]

@TomFaulkner regex is the project that caused the breakage here (see the messages above that identified the issue), so it's the one that needs fixing.

I'd accept a PR to pin Black's dependency to a non-broken version of regex, but I can't promise an immediate release of Black.

[JelleZijlstra]

No need for additional comments saying that yet more people hit this issue.

[TomFaulkner]

@TomFaulkner regex is the project that caused the breakage here (see the messages above that identified the issue), so it's the one that needs fixing.

I'd accept a PR to pin Black's dependency to a non-broken version of regex, but I can't promise an immediate release of Black.

I appreciate the response.

[daviddavis]

I'd accept a PR to pin Black's dependency to a non-broken version of regex, but I can't promise an immediate release of Black.

Understood. I opened #1208 in hopes of preventing future breakages when a new regex is released.

[florimondmanca]

FWIW, another user-side workaround that does not require a new release of Black nor regex is to force pip to not use binary wheels from regex when installing Black:

$ pip install black --no-binary=regex

Also works in a requirements.txt file:

black --no-binary=regex

[hugovk]

I'd accept a PR to pin Black's dependency to a non-broken version of regex, but I can't promise an immediate release of Black.

Understood. I opened #1208 in hopes of preventing future breakages when a new regex is released.

Sorry, I hadn't seen your PR, but please see #1209 for an alternative approach.

[frenck]

Our builds started working again, it looks like the issue is addressed at regex.

https://bitbucket.org/mrabarnett/mrab-regex/issues/343/wheel-for-linux#comment-55284973

[idan92]

You can try reinstalling the regex.
$ pip uninstall regex
$ pip install regex

or just
$ pip install --force-reinstall regex

works for me :)

[davedx]

I also encountered this issue and none of the various pip commands in this thread or elsewhere on the Internet helped. I was using a new Macbook Pro with the default python 3.8 installation. I wrote the steps I took to fix it here: mrabarnett/mrab-regex#413 (comment)