ycontract 0.2.5

Python library for contracts testing

ycontract

Python library for contracts testing.

This library provides functions for checking argument(in_contract) and return value(out_contract) of a function.

How to install

$ pip install ycontract

Example

Example files are here(test file)

Main example is

from ycontract import in_contract, out_contract

@in_contract(lambda a, b: a * b > 0)
def add(a, b, c):
    return a + b


@out_contract(lambda res: res > 0)
def sub(a, b):
    return a - b

And more complex example about in_contract is

@in_contract(
    lambda a0: a0 > 0,
    lambda a1, b: a1 > 0 and b > 0,
    {"a2": lambda x: x > 0},
    {
        ("a3",): lambda x: x >= 0,
        ("a3-2",): lambda x: x <= 0,
        ("a4", "a5"): lambda x, y: x > 0 and y > 0,
    },
    b=lambda x: x > 0,
)
def add_for_complex(a0, a1, a2, a3, a4, a5, b=1):
    return a0 + a1 + a2 + a3 + a4 + a5 + b

Furthermore if you want to be disable, call

ycontract.disable_contract()

LICENSES

Apache 2.0