import collections
import functools
from .currying import curry
def _compose2(f, g):
return lambda *args, **kwargs: f(g(*args, **kwargs))
@curry(evaluation_checker=curry.count_evaluation_checker(2))
def compose_with_joiner(joiner, *functions):
return functools.reduce(joiner, functions)
compose_one_arg = compose_with_joiner(_compose2)
compose = compose_with_joiner(lambda f, g: _compose2(make_single_arity(f),
force_args_return(g)))
[docs]def make_single_arity(function):
@functools.wraps(function)
def wrapped(args):
return function(*args)
return wrapped
[docs]def force_args_return(function):
@functools.wraps(function)
def wrapped(*args, **kwargs):
value = function(*args, **kwargs)
if not isinstance(value, collections.Iterable):
value = (value,)
return value
return wrapped
[docs]def tee(*functions):
def wrapped(*args, **kwargs):
return tuple(function(*args, **kwargs) for function in functions)
return wrapped