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Description:

reprit 0.9.0

reprit

In what follows python is an alias for python3.7 or pypy3.7
or any later version (python3.8, pypy3.8 and so on).
Installation
Install the latest pip & setuptools packages versions
python -m pip install --upgrade pip setuptools

User
Download and install the latest stable version from PyPI repository
python -m pip install --upgrade reprit

Developer
Download the latest version from GitHub repository
git clone https://github.com/lycantropos/reprit.git
cd reprit

Install
python setup.py install

Usage
Let's suppose we are defining a class and we want to have __repr__, that:

Includes parameters involved in instance creation.
For simple cases it should be possible
to copy string & paste in some place (e.g. REPL session)
and have similar object definition with as less work as possible.
This helps a lot during debugging, logging,
in failed test cases with randomly generated data, etc.
In case of signature change
method should handle this automatically for simple cases
like renaming/removing/changing order of parameters.

This can be done like
>>> from reprit.base import generate_repr
>>> class DummyContainer:
... def __init__(self, positional, *variadic_positional, keyword_only, **variadic_keyword):
... self.positional = positional
... self.variadic_positional = variadic_positional
... self.keyword_only = keyword_only
... self.variadic_keyword = variadic_keyword
...
... __repr__ = generate_repr(__init__)

after that
>>> DummyContainer(range(10), 2, 3, keyword_only='some', a={'sample': 42})
DummyContainer(range(0, 10), 2, 3, keyword_only='some', a={'sample': 42})

or for a class with avoidance of built-in names clash
& private'ish attributes
& both
>>> from reprit import seekers
>>> from reprit.base import generate_repr
>>> class State:
... def __init__(self, id_, name, zip_):
... self.id = id_
... self._name = name
... self._zip = zip_
...
... __repr__ = generate_repr(__init__,
... field_seeker=seekers.complex_)

after that
>>> State(1, 'Alabama', 36016)
State(1, 'Alabama', 36016)

We can also tell to skip unspecified optional parameters
>>> from reprit.base import generate_repr
>>> class Employee:
... def __init__(self, name, email=None, manager=None):
... self.name = name
... self.email = email
... self.manager = manager
...
... __repr__ = generate_repr(__init__,
... skip_defaults=True)

After that
>>> Employee('John Doe')
Employee('John Doe')
>>> Employee('John Doe',
... manager=Employee('Jane Doe'))
Employee('John Doe', manager=Employee('Jane Doe'))
>>> Employee('John Doe', 'johndoe@company.com', Employee('Jane Doe'))
Employee('John Doe', 'johndoe@company.com', Employee('Jane Doe'))

Note: this method doesn't automatically handle changes during runtime
(e.g. if someone deletes instance field
or replaces __init__/__new__ method implementation),
in this case user should update __repr__ method as well.
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 release

Bump version
bump2version --verbose release

This will set version to major.minor.patch.
Running tests
Install dependencies
python -m pip install -r requirements-tests.txt

Plain
pytest

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:

with CPython
./run-tests.sh

or
./run-tests.sh cpython

with PyPy
./run-tests.sh pypy

PowerShell script:

with CPython
.\run-tests.ps1

or
.\run-tests.ps1 cpython

with PyPy
.\run-tests.ps1 pypy