PEP 440

Version Identification and Dependency Specification

Version specifiers

• PEP 440 – Version Identification and Dependency Specification | peps.python.org # Version specifiers

A version specifier consists of a series of version clauses, separated by commas. For example:

~= 0.9, >= 1.0, != 1.3.4.*, < 2.0

The comparison operator determines the kind of version clause:

• ~=: Compatible release clause
• ==: Version matching clause
• !=: Version exclusion clause
• <=, >=: Inclusive ordered comparison clause
• <, >: Exclusive ordered comparison clause
• ===: Arbitrary equality clause.

See also

• PEP
• pip

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• PEP 440 – Version Identification and Dependency Specification | peps.python.org