通过修改参数来限制功能 [英] Function restriction by fixing an argument
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问题描述
我应该如何通过修改它的
参数来创建比原始维度更少维度的函数:
def add(x,y):
return x + y
现在我正在寻找这样的东西:
g = f(〜,1)这将是后继函数,即g(x)= x + 1。
解决方案
可以编写自己的函数:
pre $ code $ def g(y)
return f(2,y)
或者更简洁:
g = lambda y:f(2,y)
还有 functools.partial
:
import functools
def f( x,y):
return x + y
g = functools.partial(f,2)
您可以像以前一样调用它:
>>> g(3)
5
How should I make function with lesser dimensionality than the original one by fixing an argument of it:
For example I want to make successor function out of sum function as follows:
def add(x,y):
return x+y
Now I am looking for something like this:
g=f(~,1) which would be the successor function, i.e. g(x)=x+1.
解决方案
You can write your own function:
def g(y):
return f(2, y)
Or more concisely:
g = lambda y: f(2, y)
There's also functools.partial
:
import functools
def f(x, y):
return x + y
g = functools.partial(f, 2)
You can then call it as before:
>>> g(3)
5
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