typepy 0.0.13

A Python library for variable type checker/validator/converter at a run time.

Home-page: https://github.com/thombashi/typepy
Author: Tsuyoshi Hombashi
Author-email: [e-mail]
License: MIT License
Description: typepy
======

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Summary
=======

A Python library for variable type checker/validator/converter at a run time.

Features
=============
- checking a value type
- validate a value for a type
- convert a value from a type to the other type

The correspondence between Python types and ``typepy`` classes are as follows:

.. table:: Supported Types

==================== =======================================================================================================
Python Type typepy Class
==================== =======================================================================================================
``bool`` `Bool <http://typepy.rtfd.io/en/latest/pages/reference/type.html#bool-type>`__
``datetime`` `DateTime <http://typepy.rtfd.io/en/latest/pages/reference/type.html#datetime-type>`__
``dict`` `Dictionary <http://typepy.rtfd.io/en/latest/pages/reference/type.html#dictionary-type>`__
``inf`` `Infinity <http://typepy.rtfd.io/en/latest/pages/reference/type.html#infinity-type>`__
``int`` `Integer <http://typepy.rtfd.io/en/latest/pages/reference/type.html#integer-type>`__
``list`` `List <http://typepy.rtfd.io/en/latest/pages/reference/type.html#list-type>`__
``float`` `RealNumber <http://typepy.rtfd.io/en/latest/pages/reference/type.html#real-number-type>`__
``NaN`` `Nan <http://typepy.rtfd.io/en/latest/pages/reference/type.html#nan-type>`__
``None`` `None <http://typepy.rtfd.io/en/latest/pages/reference/type.html#none-type>`__
``str`` (not null) `String <http://typepy.rtfd.io/en/latest/pages/reference/type.html#string-type>`__
``str`` (null) `NullString <http://typepy.rtfd.io/en/latest/pages/reference/type.html#null-string-type>`__
``str`` (IP address) `IpAddress <http://typepy.rtfd.io/en/latest/pages/reference/type.html#ip-address-type>`__
==================== =======================================================================================================

Usage
=====

Type Check Method
----------------------
:Examples:
.. code:: pycon

>>> from typepy.type import Integer
>>> Integer(1).is_type()
True
>>> Integer(1.1).is_type()
False


Type Validation Method
--------------------------------------------
:Examples:
.. code:: pycon

>>> from typepy.type import Integer
>>> Integer(1).validate()
>>> try:
... Integer(1.1).validate()
... except TypeError as e:
... print(e)
...
invalid value type: expected=INTEGER, actual=<type 'float'>


Type Conversion Methods
--------------------------------------------

convert method
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:Examples:
.. code:: pycon

>>> from typepy.type import Integer
>>> from typepy import TypeConversionError
>>> Integer("1").convert()
1
>>> try:
... Integer(1.1).convert()
... except TypeConversionError as e:
... print(e) # convert() raised TypeConversionError when conversion failed
...
failed to convert from float to INTEGER

try_convert method
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:Examples:
.. code:: pycon

>>> from typepy.type import Integer
>>> Integer("1").try_convert()
1
>>> print(Integer(1.1).try_convert()) # try_convert() returned None when conversion failed
None

force_convert
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:Examples:
.. code:: pycon

>>> from typepy.type import Integer
>>> Integer("1").force_convert() # force_convert() forcibly convert the value
1
>>> Integer(1.1).force_convert()
1

For more information
====================

Type check/validate/convert results will be changed according to
``strict_level`` value which can be passed to constructors as an argument.
More information can be found in the
`API reference <http://typepy.rtfd.io/en/latest/pages/reference/index.html>`__.

Installation
============

::

pip install typepy


Dependencies
============
Python 2.7+ or 3.3+

- `mbstrdecoder <https://github.com/thombashi/mbstrdecoder>`__
- `python-dateutil <https://dateutil.readthedocs.io/en/stable/>`__
- `pytz <https://pypi.python.org/pypi/pytz/>`__
- `six <https://pypi.python.org/pypi/six/>`__


Test dependencies
-----------------
- `pytest <http://pytest.org/latest/>`__
- `pytest-runner <https://pypi.python.org/pypi/pytest-runner>`__
- `tox <https://testrun.org/tox/latest/>`__

Documentation
=============

http://typepy.rtfd.io/


Keywords: type,validator,converter
Platform: UNKNOWN
Classifier: Development Status :: 3 - Alpha
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Information Technology
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Topic :: Software Development :: Libraries
Classifier: Topic :: Software Development :: Libraries :: Python Modules