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os-error-alias (UP024)

Added in v0.0.206 · Related issues · View source

Derived from the pyupgrade linter.

Fix is always available.

What it does

Checks for uses of exceptions that alias OSError.

Why is this bad?

OSError is the builtin error type used for exceptions that relate to the operating system.

In Python 3.3, a variety of other exceptions, like WindowsError were aliased to OSError. These aliases remain in place for compatibility with older versions of Python, but may be removed in future versions.

Prefer using OSError directly, as it is more idiomatic and future-proof.

Example

raise IOError

Use instead:

raise OSError

References