$ errors.fyi/flake8/F821 128 namespaces · 4,025 codes

flake8 · flake8/F821

F821

Undefined Name

A name is used that has not been defined in any accessible scope. Check for typos, missing imports, or use before assignment.

References

flake8.pycqa.org/en/latest/user/error-codes.html

In this namespace

← previous F811 Redefinition of Unused Name From Import next → F841 Local Variable Assigned But Never Used

E721 E731 E741 F401 F811 F821 F841 W191 W291 W292 W391

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