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aiwonderland.functools

My main Python functools toolset.

Additional functools in the spirit of the standard library's functools.

pip install -e . to install from a checkout. Python 3.10+. No runtime dependencies.

aiwonderland.functools

Decorator / factory What it does
once(func) run func at most once, cache the result
silent(default) catch Exception, return default
pipe(*funcs) left-to-right composition
pass_param(func, validator, fb) short-circuit on a sentinel first argument
memoize(func) cache results keyed by arguments
tap(side_effect=print) log calls; return value unchanged
print_yielded(func) print every value a generator yields
run_sync(coro_func) call an async def synchronously

See each callable's docstring for parameters, return type, and examples.

from aiwonderland.functools import memoize, pipe, run_sync

@memoize
def fib(n):
    return n if n < 2 else fib(n - 1) + fib(n - 2)

@run_sync
async def fetch_status():
    return "ok"

print(fib(50), pipe(lambda x: x * 2, lambda x: x + 1)(3), fetch_status())

License

MIT. See LICENSE.

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