fptk 1.0.0rc1

fptk (Functional Programming Toolkit) — Pragmatic functional programming helpers for Python (pipe/compose/curry, Option/Result, lazy iterators, applicative validation).

Pragmatic functional programming for Python 3.13+

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Install

pip install fptk

Quick Example

from fptk.core.func import pipe
from fptk.adt.option import Some, NOTHING
from fptk.adt.result import Ok, Err

# Compose transformations
result = pipe(5, lambda x: x + 1, lambda x: x * 2)  # 12

# Handle absence explicitly
name = Some("alice").map(str.upper).unwrap_or("anonymous")  # "ALICE"

# Type-safe error handling
def parse(s: str) -> Result[int, str]:
    try:
        return Ok(int(s))
    except ValueError:
        return Err(f"invalid: {s}")

parse("42").map(lambda x: x * 2)  # Ok(84)

Documentation

mhbxyz.github.io/fptk

License

MIT