The difference between a normal parameter, a specified parameter, a default parameter, and a dynamic parameter in a function

1. The normal parameter is the same as the parameters passed in the following function passed in the function, there is no default value

1 def F (a): 2     A = a + 13     return  a45 b=f (3)6Print (b)

2. Specify parameters

1 # If you pass in order like this, if you do not specify a value for the parameter, the A,B,C will be assigned the initial value in order . 2 d=f (3,4,5)3print(d)4# If you specify the value of a,b,c like this, Then they are the specified parameters that can be passed in their original order 5 e=f (c=5,b=4,a=3)6print(e)

3. Default parameters

1 #Default Parameters2 #To specify the initial value of B in parentheses like this, then B becomes the default parameter3 defF (a,b=9):4sum = a +b5     return(sum)6 7 #As can be seen here, we only pass in a parameter 3, it will be assigned by default in order to the first variable, a, B, is equal to the original default value of 98C=f (3)9 Print(c)Ten  One #when two parameters are passed, assigned to a, B, respectively, then A=3,B=4,B is re-assigned. AD=f (3,4) - Print(d)

4. Dynamic Parameters

1 #Dynamic Parameters2 #dynamic parameter *args means that when we need to pass in more than one parameter, we can use *args to represent multiple parameters, instead of specifying multiple parameters in parentheses separately .3 defF (*args):4     Print(Args,type (args))5 6D=f (A)7 8 #dynamic parameter **kwargs can be used when we need to pass in the parameter of the key value pair type **kwargs9 defF (* *Kwargs):Ten     Print(Kwargs,type (Kwargs)) One  AD=f (a=3,b=4) -  - #the parameters of the dynamic parameters of the universal mode, so that we can no matter how to pass the parameters of almost no error the defF (a,*args,**Kwargs): -     Print(A,args,type (args), Kwargs,type (Kwargs)) -  -D=f (22,33,44,k1=55,k2=66)

The difference between a normal parameter, a specified parameter, a default parameter, and a dynamic parameter in a function