是否有可能在Python函数内部将单个参数传递给两个不同的参数?

Question

正如标题所解释的，我想知道是否有可能在调用Python函数时将单个参数传递给两个不同的形参。在例子:

def function(a, b):
return a + b

# The idea being that both a and b are assigned the value of 3 when the function is called
function(3)

Answer 1

给b一个默认值。如果包含default，则替换为a。

def f(a, b=None):
if b is None:
b = a
return a + b

Answer 2

如果你想概括和允许任意数量的args

>>> def sumify(*args):
...     return sum(args)
... 
>>> sumify(1,2,3)
6
>>> sumify(1)
1
>>> sumify()
0