SemaVer

SemaVer is a simple library for Python that helps to work with versions using semantic versioning notation.

Build status

Requirements

Python >=3.5

Installation

pip install semaver

Usage

Version objects

To create version, instantiate Version class passing version identifier as a constructor argument:

from semaver import Version

v1_0_0 = Version('1.0.0')

Valid version identifiers can be found as [https://semver.org/] except that currently SemaVer does not support pre-release and [build metadata] specs.

All non-specified parts of the version identifier counted as zeroes, i. e. '1' == '1.0' == '1.0.0'.

Compare versions

You may compare versions using regular Python comparison operators:

from semaver import Version

v1_0 = Version('1.0')
v1_0_0 = Version('1.0.0')
v1_0_1 = Version('1.0.1')

assert v1_0 == v1_0_0  # True
assert v1_0 != v1_0_0  # False

assert v1_0 < v1_0_1  # True
assert v1_0 <= v1_0_1  # True
assert v1_0 > v1_0_1  # False
assert v1_0 >= v1_0_1  # False

# Or using plain strings

assert v1_0 == '1'  # True
assert v1_0 == '1.0'  # True
assert v1_0 == '1.0.0'  # True

Also it is possible to compare versions against strings:

from semaver import Version

v1_0 = Version('1.0')
v1_0_0 = Version('1.0.0')
v1_0_1 = Version('1.0.1')

Adding and subtracting versions

from semaver import Version

print(Version('1.0.0') + Version('0.1.1'))  # '1.1.1'

from semaver import Version

print(Version('2.0.1') - Version('1.0.1'))  # '1.0.0'

Version range objects

Instance of VersionRange represents a version range. First argument of constructor is a version range identifier.

from semaver import VersionRange

VersionRange('1.x')

Following formats are supported.

• PEP-440 version specifiers except ~= and === clauses.
• NPM version range syntax.

For example, each item of the following list shows equal version range identifiers:

• 1.x, 1.*, ^1, >=1,<2.
• ^1.1, >=1.1,<2.
• 1.0.x, 1.0.*, ~1, ~1.0.

Checking if a version is in a range

from semaver import Version, VersionRange

v1_2_3 = Version('1.2.3')
v1_x = VersionRange('1.x')
v2_x = VersionRange('2.x')

assert v1_2_3 in v1_x  # True
assert v1_2_3 in v2_x  # False

# Or using plain strings

assert '1.2.3' in v1_x  # True
assert '1.2.3' in v2_x  # False

Checking if a range is in a range

from semaver import VersionRange

v1_to_3 = VersionRange('>=1,<=3')
v2_x = VersionRange('2.x')

assert v2_x in v1_to_3  # True
assert v1_to_3 in v2_x  # False

# Or using plain strings

assert '2.x' in v1_to_3  # True
assert '>=1,<=3' in v2_x  # False

Testing

tox

Contributing

See the CONTRIBUTING.md file for details.

Changelog

See the CHANGELOG.md file for details.

Support

If you have any issues or enhancement proposals feel free to report them via project's Issue Tracker.

Authors

• Oleksandr Shepetko -- initial work.

License

This project is licensed under the MIT License. See the LICENSE.md file for details.

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