Utility Functions

monad.utils - utility functions and values.

class smonad.utils.SuppressContextManager(*exceptions)

Bases: object

Context manager class that suppress specified exceptions.

smonad.utils.compose(f, g)

Function composition.

compose(f, g) -> f . g

>>> add_2 = lambda a: a + 2
>>> mul_5 = lambda a: a * 5
>>> mul_5_add_2 = compose(add_2, mul_5)
>>> mul_5_add_2(1)
7
>>> add_2_mul_5 = compose(mul_5, add_2)
>>> add_2_mul_5(1)
15

smonad.utils.failed(obj)

Return a Boolean that indicates if the value is an instance of smonad.types.ftry.Failure

>>> from smonad.types.ftry import Failure, Success
>>> failed(Failure('shit is fucked up'))
True
>>> failed(Success('it worked!'))
False

smonad.utils.identity(a)

Identity function.

smonad.utils.ignore_exception_set(*exceptions)

Helper function for suppress.

smonad.utils.succeeded(obj)

Return a Boolean that indicates if the value is an instance of smonad.types.ftry.Success

>>> from smonad.types.ftry import Failure, Success
>>> succeeded(Success(True))
True
>>> succeeded(Failure('fubar'))
False

smonad.utils.suppress(*exceptions)

Context manager that suppress specified exceptions.

>>> with suppress(ZeroDivisionError):
...     42 / 0