pyfunctional-elunico 0.8.1

A small collection of functions I find useful

pyfunctional

This is a collection of functional tools I like to use in Python

Contents

alleq(iterable: Iterable[S]) -> bool

returns True if an iterable is empty or if all elements are equal to the first

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transpose(double_iterable: Iterable[Iterable[S]])

an iterable object that takes a nested iterable and transposes it lazily

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repeat(element: E, count: int)

an iterable object that takes an element and a count and returns that element count times

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attempt(
  block: Callable[[Any], T],
  default: T = None,
  catch: Union[Type[Exception], Iterable[Type[Exception]]] = (Exception,),
  args: Iterable[Any],
  kwargs: Dict[Any, Any]
) -> T

a function that takes a callable, a default value, a list of excpetion types, an arg tuple, and a kwarg dict and calls the callable, catching the exceptions specified, and returning the function value on success, the default value on a known caught exception, and allowing any other none-accounted for exceptions bubble up.

rreduce(
    reduction: Callable[[R, E], R],
    indexable: Indexable,
    initvalue: Union[R, Sentinel] = sentinel
) -> R

Performs the same operation as functools.reduce but working from the right side (high indices) of the collection rather than the start (lower indices) of the collection. Requires the collection to support len() and indexing (iterators do not support __getitem__ but lists and tuples--for example--do)

Not the specification for Indexable below

from typing import Protocol

class Indexable(Protocol):
  def __getitem__(self, index: int) -> Any: ...
  def __len__(self) -> int: ...