python_ advanced functions

1. When the function name variable to use

DEF FUNC ():
     Print ( ' WDC ' )
 # A function can be assigned to variables 
V1 = FUNC 
V1 () 
FUNC ()

FUNC DEF (): 
    Print ( 'WDC') 
# function can be placed in the list, the list later performed by bracketed indices 
func_list = [FUNC, FUNC, FUNC] 
func_list [0] () 
func_list [. 1] () 
func_list [2 ] ()

FUNC DEF (): 
    Print ( 'WDC') 
# function can be placed in the list, performed by the rear brackets for loop 
func_list = [FUNC, FUNC, FUNC] 
for func_list in Item: 
    Item ()

FUNC DEF (): 
    Print ( 'WDC') 
# function may also be in the set, but not the same place, or to automatically re-executed only once 
func_list FUNC = {, FUNC, FUNC} 
for func_list in Item: 
    Item ()

FUNC DEF (): 
    Print ( 'WDC') 
# automatic repeat function can be placed, the index in parentheses performed 
info = { 'K1': FUNC, 'K2': FUNC} 
info [ 'K1'] () 
info [ ' K2 '] () 
#### KEY function can be used as a dictionary, but generally do not

2. Functions can be passed as parameters

DEF FUNC (Arg):
     Print (Arg) 

DEF show ():
     return 999
 # transfer functions show the address of 
func (show)

FUNC DEF (Arg): 
    # parentheses show address equals show (), equivalent to calling the function show 
    v1 = Arg () 
    # not show because the return value, the value of v1 None 
    Print (v1) 

DEF show (): 
    Print (666) 
# pass parameters show the address of 
func (show)