optypecheck 16

A non intrusive and optional *type checking for Python 3* using annotations

This package implements a non intrusive and optional type checking in functions and methods by using annotations. Once types are defined in annotations, no changes are required to make the verification of types. And, because it is completely optional, it can be used only in the desired environments, like unit testings. This way, the performance of production code is not affected.

Learn more in:

https://bitbucket.org/carlopires/optypecheck

Installation

pip3 install optypecheck

Example

def gencode(a: bytes, b: str) -> str:
    return '{}{}'.format(a[0], b)

def valid_number(n) -> 'decimal.Decimal':
    return n

# enable type checking in DEBUG mode
assert __import__('typecheck').typecheck(__name__)