Tip: python function transfer is variable length

First come to Practice one:

def F1 (*args):    print(args) F1 (1,2,3,4): (1, 2, 3, 4)  ----- It's a Meta-ancestor.

Part 1:

The *args can pass any number of numbers, and args returns a primitive that can iterate

If you want to pass in a list or a meta-ancestor and change it into multiple arguments, let's say I entered [1,2,3,4] and passed into F1 to F1 (1,2,3,4) four parameters

def F1 (*args):print(args) F1 ([1,2,3,4])
draw: ([1,2,3,4],), If I do this is just a parameter, for args, just one element of the *args can be considered as a multi-parameter type, the Meta-ancestor split into a parameter, Just like the following print (*args): 1 2 3 4

If I pass a parameter to a function, this function passes the argument to another function, which can be used as above

def F1 (*args):    f2 (*args)        # so a,b,c,d will be assigned def  F2 (a,b,c,d) :    print(a,b,c,d) F1 ([1,2,3,4])

Part 2:

**args is a custom parameter value, args is the dictionary type, **args the args dictionary, if you want to pass two times the same group:

def f3 (** kwargs):    f2 (* *Kwargs)def  F2 (a,b,c,d    ): Print (a,b,c,d) f3 (a=1,b=2,c=3,d=4)

What the hell is *kwargs?

defF4 (*args,**kwargs):Print(args,kwargs) f4 (1,2,a=3,b=4 If such a function, well understood, the first one is Ganso ( the second one is the dictionary {'a': 3, 'b': 4} defF4 (*args,**kwargs):Print(*args,*Kwargs) First glance: wipe, this can be performed, but the result of this execution is:1 2a B comes in a three paragraph: * Take out Kwargs's Keykwargs is a dictionary also can say * You can remove the key from any dictionary. speculation: that is, any key can be*split, to perform one of the following:Print(*{'a': 3,'b': 4}) to conclude that a B means*similar operators, list to try:Print(*[1,2,3,4]) to draw 12 3 4string to Try:Print(*"FDFDSFD") that F D F D s f D can be extended to any iterator? indeed, no, * Only with strings, lists, dictionaries, collections, can only pass parameters in the function, the dictionary can only pass key, then I will pass the value of two * *

Tip: python function transfer is variable length