topo

In what follows

• python is an alias for python3.5 or any later version (python3.6 and so on),
• pypy is an alias for pypy3.5 or any later version (pypy3.6 and so on).

Installation

Install the latest pip & setuptools packages versions:

• with CPython

  python -m pip install --upgrade pip setuptools

• with PyPy

  pypy -m pip install --upgrade pip setuptools

User

Download and install the latest stable version from PyPI repository:

• with CPython

  python -m pip install --upgrade topo

• with PyPy

  pypy -m pip install --upgrade topo

Developer

Download the latest version from GitHub repository

git clone https://github.com/lycantropos/topo.git
cd topo

Install:

• with CPython

  python setup.py install

• with PyPy

  pypy setup.py install

Usage

topo provides

• hashable,
• partially ordered by <= ("is subset of") and >= ("is superset of") relations,
• strictly ordered by < ("is strict subset of") and > ("is strict superset of") relations

models & objects:

• EMPTY_SET: for set with no elements

  >>> from topo.base import EMPTY_SET
  >>> EMPTY_SET
  EmptySet()
  >>> str(EMPTY_SET)
  '{}'
  >>> EMPTY_SET <= EMPTY_SET
  True
  >>> EMPTY_SET < EMPTY_SET
  False
  >>> 1 in EMPTY_SET
  False
  # and so on for every object

• DiscreteSet: for discrete sets of hashable objects (similar to built-in sets)

  >>> from topo.discrete import DiscreteSet
  >>> binary_set = DiscreteSet(0, 1)
  >>> binary_set
  DiscreteSet(0, 1)
  >>> str(binary_set)
  '{0, 1}'
  >>> EMPTY_SET <= binary_set
  True
  >>> binary_set < EMPTY_SET
  False
  >>> 0 in binary_set
  True
  >>> 10 in binary_set
  False

• Interval: for intervals of floating point numbers

  >>> from topo.continuous import Interval
  >>> unit_segment = Interval(0, 1)
  >>> unit_segment
  Interval(0, 1, left_end_inclusive=True, right_end_inclusive=True)
  >>> str(unit_segment)
  '[0, 1]'
  >>> binary_set <= unit_segment
  True
  >>> unit_segment < binary_set
  False
  >>> 0.5 in unit_segment
  True
  >>> 10 in unit_segment
  False

with next operators overloaded:

• |: for sets union

  >>> unit_segment | binary_set
  Interval(0, 1, left_end_inclusive=True, right_end_inclusive=True)

  since unit_segment contains binary_set elements.

• -: for sets difference

  >>> unit_segment - binary_set
  Interval(0, 1, left_end_inclusive=False, right_end_inclusive=False)

  as we can see both ends were excluded.

• &: for sets intersection

  >>> unit_segment & binary_set
  DiscreteSet(0, 1)

Also used in conditionals sets will evaluate to False if they are considered empty and True otherwise:

>>> if not EMPTY_SET:
        print('Hello World!')
    else:
        print('Something went wrong.')
Hello World!

Development

Bumping version

Preparation

Install bump2version.

Pre-release

Choose which version number category to bump following semver specification.

Test bumping version

bump2version --dry-run --verbose $CATEGORY

where $CATEGORY is the target version number category name, possible values are patch/minor/major.

Bump version

bump2version --verbose $CATEGORY

This will set version to major.minor.patch-alpha.

Release

Test bumping version

bump2version --dry-run --verbose --tag release

Bump version

bump2version --verbose --tag release

This will set version to major.minor.patch and add Git tag.

Notes

To avoid inconsistency between branches and pull requests, bumping version should be merged into master branch as separate pull request.

Running tests

Plain:

• with CPython

  python setup.py test

• with PyPy

  pypy setup.py test

Inside Docker container:

• with CPython

  docker-compose --file docker-compose.cpython.yml up

• with PyPy

  docker-compose --file docker-compose.pypy.yml up

Bash script (e.g. can be used in Git hooks):

• with CPython

  ./run-tests.sh

  or

  ./run-tests.sh cpython

• with PyPy

  ./run-tests.sh pypy

PowerShell script (e.g. can be used in Git hooks):

• with CPython

  .\run-tests.ps1

  or

  .\run-tests.ps1 cpython

• with PyPy

  .\run-tests.ps1 pypy