ImportError: cannot import name 'Reporter' from 'coverage.report'

TL;DR

Upgrade the tool that imports Reporter (often an old PyCharm pytest plugin or pinned pytest-cov), or align coverage to a version that still has it. Reporter was removed from coverage.report in coverage 7.

ImportError: cannot import name 'Reporter' from 'coverage.report'

Fix it

1. Find who imports it. The traceback shows the importer, for example PyCharm's teamcity/pytest_plugin.py doing from coverage.report import Reporter.

• Expected: the file and line are named in the traceback.

1. Upgrade the importer. Update PyCharm, or run python -m pip install -U pytest-cov coverage.

• Expected: the new importer no longer references the removed name.

1. If you cannot upgrade the importer, pin coverage to 6.x: python -m pip install "coverage<7".

• Expected: Reporter imports fine again.

When this applies

• Old IDE plugins (PyCharm 2020-era) or old pytest-cov with coverage 7.
• The traceback literally says from coverage.report import Reporter.

When it does not apply

• If the missing name is display_covered from coverage.results, that is the sibling issue with its own fix.

Tool compatibility

coverage 7 removed Reporter from coverage.report. PyCharm 2020.x and old pytest-cov predate the removal.

Why it happens

coverage 7 refactored its reporting internals and dropped the Reporter class. Anything importing it directly breaks on upgrade.

Edge cases

• JetBrains fixed this in later PyCharm releases; updating the IDE is the cleanest fix (see PY-40980).