AttributeError: module 'flynt' has no attribute 'process'

[hugovk]

Describe the bug

I get AttributeError when running Darker.

To Reproduce
Steps to reproduce the behavior:

1. pip install -U darker flynt
2. Run Darker with darker .
3. See error / wrong behavior

❯ ❯ darker --help
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.12/bin/darker", line 5, in <module>
    from darker.__main__ import main_with_error_handling
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/darker/__main__.py", line 25, in <module>
    from darker.fstring import apply_flynt, flynt
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/darker/fstring.py", line 14, in <module>
    flynt_fstringify_code_by_line = flynt.process.fstringify_code_by_line
                                    ^^^^^^^^^^^^^
AttributeError: module 'flynt' has no attribute 'process'

Expected behavior

No AttributeError.

Environment (please complete the following information):

• OS: macOS Sonoma 14.2.1
• Python version 3.12.2
• Git version 2.44.0
• Darker version 1.7.3
• Black version 24.1.1

Additional context

Started happening between 1.6.1 and 1.7.0.

git bisect points to f8f9e4c in PR #308.

f8f9e4c3f692917536603ccbb911777447748e30 is the first bad commit
commit f8f9e4c3f692917536603ccbb911777447748e30
Author: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date:   Mon Dec 26 17:55:21 2022 +0200

    Implement `flynt` support

 src/darker/__main__.py                             | 247 +++++++++++++++------
 src/darker/config.py                               |   2 +
 src/darker/diff.py                                 |   3 +
 src/darker/fstring.py                              |  75 +++++++
 src/darker/git.py                                  |   2 +
 src/darker/linting.py                              |  10 +
 src/darker/tests/test_command_line.py              |  14 +-
 src/darker/tests/test_fstring.py                   |  50 +++++
 src/darker/tests/test_main.py                      | 132 ++++++++---
 .../test_main_blacken_and_flynt_single_file.py     | 133 +++++++++++
 src/darker/tests/test_main_blacken_single_file.py  | 130 -----------
 11 files changed, 568 insertions(+), 230 deletions(-)
 create mode 100644 src/darker/fstring.py
 create mode 100644 src/darker/tests/test_fstring.py
 create mode 100644 src/darker/tests/test_main_blacken_and_flynt_single_file.py
 delete mode 100644 src/darker/tests/test_main_blacken_single_file.py

[akaihola]

Thanks @hugovk!

Which version of Flynt do you have? What if you downgrade it, can you find an earlier version which doesn't make Darker fail?

[akaihola]

Also, could you check whether #480 fixes this?

[hugovk]

Reproducible with Flynt 1.0.0 and 1.0.1, not with 0.78.

And yes, #480 fixes it :)

[akaihola]

And yes, #480 fixes it :)

Ok, that's planned for version 2.1.0.

[akaihola]

Duplicate of #472.