TypeError: CoverallsReporter() takes no arguments

[VovaMazur]

Dear Sirs,

Trying to setup coveralls for pretty simple flask web app.
UT is done with coverage / unittest.

After the successful built (with TravisCI), coveralls command shows below error:
Traceback (most recent call last):
File "C:\Users\Asus\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 196, in _run_module_as_main
return run_code(code, main_globals, None,
File "C:\Users\Asus\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 86, in run_code
exec(code, run_globals)
File "D:\Documents\EPAM\Pet_projects\Python EPAM stream\venv\Scripts\coveralls.exe_main.py", line 7, in
File "D:\Documents\EPAM\Pet_projects\Python EPAM stream\venv\lib\site-packages\coveralls_init.py", line 93, in wear
source_files=coverage.coveralls(args.base_dir, ignore_errors=args.ignore_errors, merge_file=args.merge_file),
File "D:\Documents\EPAM\Pet_projects\Python EPAM stream\venv\lib\site-packages\coveralls\control.py", line 7, in coveralls
reporter = CoverallsReporter(self, self.config)
TypeError: CoverallsReporter() takes no arguments

---

Travis.yml script:

language: python
python:

• "3.9" # current default Python on Travis CI

install:

• pip install -r requirements.txt

script:

• pylint --exit-zero manifestapp
• coverage run -m unittest tests
• coverage report

after_success:

• coveralls

[bfontaine]

I encountered this error as well on xtools. The issue is that python-coveralls depends on coverage without specifying any version, so if coverage introduces breaking changes, like it did in the release 5.0.0 that removed the Reporter class, everything breaks.

Until this library is fixed, the solution is to downgrade coverage to 4.5.4. If you use pytest-cov, you’ll have to downgrade it as well to the last version that supported coverage<5.0, i.e. 2.10.1.

If you use Poetry, this is the solution:

poetry remove pytest-cov
poetry add --group dev coverage@4.5.4
poetry add --group dev pytest-cov@2.10.1