libb.compose

compose(*functions)

Return a function folding over a list of functions.

Each arg must have a single param.

Parameters:

functions – Functions to compose.

Returns:

Composed function.

Example:

>>> f = lambda x: x+4
>>> g = lambda y: y/2
>>> h = lambda z: z*3
>>> fgh = compose(f, g, h)

Beware of order for non-commutative functions (first in, last out):

>>> fgh(2)==h(g(f(2)))
False
>>> fgh(2)==f(g(h(2)))
True