python - function

 

 

 

 

 

 

 

 

 

• python 函数的参数可以具有默认值

We can provide a default value to an argument by using the assignment operator (=).

 

 

 

 

 

 

 

 

• python函数的参数都可以有默认值，但是有默认值的参数必须在右侧，否则报错。

Any number of arguments in a function can have a default value. But once we have a default argument, all the arguments to its right must also have default values.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• python函数，支持参数可以是多个或者是未知数个参数。

Sometimes, we do not know in advance the number of arguments that will be passed into a function. Python allows us to handle this kind of situation through function calls with an arbitrary number of arguments.

In the function definition, we use an asterisk (*) before the parameter name to denote this kind of argument.

 

 

 

 

 

keyword argument: