Functools: high order functions and operations on callable objects (continuous updating ing...)

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functools Official documents ：functools — Higher-order functions and operations on callable objects — Python 3.10.5 documentation
functools Is for an existing function （callable object ） Operate on , Generate a new function （callable object ）. In this paper, functools Functions and objects .
Continuous updating .

Last updated ：2022.6.28
Earliest update time ：2022.6.28

1. partial

partial The properties of an object are functions func、 Positional arguments 、 Keyword parameters . It is generally used to fix some parameters of a function , Pass in other parameters . If fixed int(x,base) Function base Enter the reference （ The goal of this function is to base It's binary x Convert to int Formatted integer object ）：

from functools import partial
basetwo = partial(int, base=2)
basetwo.__doc__ = 'Convert base 2 string to an int.'
print(basetwo('10010'))

Output ：18

Reference material ：

1. python Median partial function functools.partial Use _ A flash of hope to my blog -CSDN Blog _functools.partial( This article introduces functools Advantages over repeatedly defining new functions , The differences between position parameters and keyword parameters and their introduction methods are also introduced .