位置参数v.s.关键字argumen

Question

基于this

A positional argument is a name that is not followed by an equal sign (=) and default value.

A keyword argument is followed by an equal sign and an expression that gives its default value.

def rectangleArea(width, height):
    return width * height

print rectangleArea(width=1, height=2)

问题>；我假设width和height都是位置参数。那为什么我们还可以用关键字参数语法来调用它呢？

Answer 1

位置参数可以按顺序使用值或通过命名每个值来调用。例如，以下三种方法都将以相同的方式工作：

def rectangleArea(width, height):
    return width * height

print(rectangleArea(1, 2))
print(rectangleArea(width=1, height=2))
print(rectangleArea(height=2, width=1))