Library that eXtends functools.partial to allow for selective argument freezing. Skip positional arguments one by one, assign from the end of the argument list, overwrite frozen arguments with kwargs, and make use of default values in middle of your function calls.
Install the package (todo) with:
pip install xpartial
Basic usage:
from xpartial import xpartial, Skip, SkipRest
# Same as: xpartial(range, stop=5)
f = xpartial(range, Skip, 6) # 'Skip' skips a single positional arg
f(2) # -> 2, 3, 4, 5
f(1, 2) # -> 1, 3, 5
foo = lambda a, b, c=0, d=0, e=0: (a, b, c, d, e) # takes+returns 5 args
g = xpartial(foo, 10, SkipRest, 40, 50) # 'SkipRest' greedily skips args
g(20, 30) # -> 10, 20, 30, 40, 50
g(20) # -> 10, 20, 0, 40, 50
bar = lambda a=3, b=5, *args: (a, b, *args)
h = xxpartial({...}, 15) # alternative syntax: ...=Skip, {...}=SkipRest
h(1, 2, 3) # -> 1, 2, 3, 15 (frozen args are in the very end)
h() # -> 3, 5, 15 (default values are applied)
h(Skip, 42, 1337) # -> 3, 42, 1337, 15 (Skips here use default values)You may read the documentation here.
This project is licensed under The Unlicense. Started in 2021.