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Sourcery Sourcery

Collection Into Set

Documentation Index

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Sourcery refactoring id: collection-into-set

Section titled “Sourcery refactoring id: collection-into-set”

Description:

Section titled “Description:”

Use set when checking membership of a collection of literals

Before:

Section titled “Before:”
if currency in ["EUR", "USD"]:
    take_payment()

After:

Section titled “After:”
if currency in {"EUR", "USD"}:
    take_payment()

Explanation:

Section titled “Explanation:”

When checking if a variable is one of a collection of literals it is both more natural and more performant to use a set rather than a list or tuple to define that collection. Note that this can only be done where Sourcery can ascertain that the value being checked is of a hashable type.