use-set-for-membership / R6201#

Message emitted:

Consider using set for membership test


Membership tests are more efficient when performed on a lookup optimized datatype like ``sets``.

Correct code:

# This is a placeholder for correct code for this message.

Additional details:

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This message is emitted by the optional 'set_membership' checker which requires the pylint.extensions.set_membership plugin to be loaded.

Created by the set_membership checker.