easysemver 0.2.0

Simple semver utilities for Python.

easysemver

This package provides utilities for comparing SemVer versions, with special attention on the correct treatment of prerelease parts.

Installation

easysemver can be installed from PyPI:

pip install easysemver

Usage

Before versions can be compared, they must be converted into Version objects. If the version is not valid SemVer, a TypeError will be raised.

from easysemver import Version

# Not a valid SemVer version, so raises TypeError
version = Version("20230809-1")
# Create a SemVer version
version = Version("1.2.3")
# Prerelease and build parts are supported
version = Version("1.2.3-alpha.0+abcdefg")

# Comparing versions respects prerelease parts
#   The following all resolve to True
Version("1.2.3") < Version("1.2.4")
Version("1.2.3") < Version("2.0.0")
Version("1.2.3") < Version("1.2.4-alpha.0")
Version("1.2.3-alpha.0") < Version("1.2.3")
#   Prerelease parts that are all digits are compared as numbers
Version("1.2.3-alpha.0") < Version("1.2.3-alpha.100")
#   Prerelease parts that are strings are compared as strings
Version("1.2.3-alpha.0") < Version("1.2.3-beta.0")
#   Note that build parts don't affect comparison
Version("1.2.3") == Version("1.2.3+abcdefg")

Versions can also be compared to a SemVer range, which consists of a number of constraints separated by commas. Similar to Version, a TypeError will be raised if the constraints are not valid.

The supported constraints are SemVer versions with an operator, where the supported operators are ==, !=, >=, >, <= and <.

from easysemver import Range, Version

# Resolves to True
Version("1.2.3") in Range(">=1.0.0,<2.0.0")
# Resolves to False
Version("1.2.3") in Range(">=2.0.0")
# Prerelease versions are only considered part of a range if the lower bound includes a prerelease part
#   Resolves to False
Version("1.2.3-alpha.0") in Range(">=1.0.0")
#   Resolves to True
Version("1.2.3-alpha.0") in Range(">=1.0.0-0")
# Specific versions can be exclulded
#   Resolves to False
Version("1.2.3") in Range(">=1.0.0,<2.0.0,!=1.2.3")
#   Resolves to True
Version("1.2.4") in Range(">=1.0.0,<2.0.0,!=1.2.3")