Python Basics Four

Functions and procedures

#-*-coding:utf-8-*-#functiondeffunc1 ():"""testing1"""    Print('In the func1')    return0#procedure is a function that does not return a valuedefFunc2 ():"""testing2"""    Print('In the Func2') x=func1 () y=Func2 ()Print('From func1 return is%s'%x)Print('From Func2 return is%s'%y

The above code runs the result

inch The func1 inch The Func2  from return  is 0  from return  is None

Function call Example one:

# -*-coding:utf-8-*- def Test (x, y    ): Print ('x=%d'%x)     Print ('y=%d'%y) Test (y=2,x=1) # keyword invocation, independent of formal parameter order

The above code runs the result

X=1y=2

Example two:

# -*-coding:utf-8-*- def Test (x, y    ): Print ('x=%d'%x)     Print ('y=%d'%y) Test (+)   # positional parameter invocation, actual participation in the position one by one corresponding to the formal parameter

The above code runs the result

X=1y=2

Example three:

# -*-coding:utf-8-*- def Test (x, y    , z): Print ('x=%d'%x)     Print ('y=%d'%y) Test (3,z=2,y=6) # keyword to be placed after the position parameter

The above code runs the result:

X=3y=6

Python Basics Four