1. Description
Keyword passing participates in real parameter association in the form of "formal parameter variable name = real parameter", passing parameters according to the name of the formal parameter, so that the order of real and formal parameters is not consistent. You don't need to worry about the order of parameters when defining a function, you can just specify the corresponding names when passing parameters.
2. Two forms
makeup_url(protocal='http', address='') makeup_url(address='',protocal='http')
3. Examples
def makeup_url(protocal, address):
print("URL = {}: //{}".format(protocal, address))
Content Extension:
python-keyword-passing-arguments
1. Must be passed in accordance with the keywords
Variables after * must be passed in accordance with the keyword
eg:
def kwonly(a,*b,c):#c must be passed by keyword, b receives remaining arguments, a can be passed by position or by keyword
kwonly(1, = 3) is correct
kwonly(1,2,3,c = 4) is correct
kwonly(1,2,3) error
def kwonly(a,*,b,c)#a can be passed by position or by argument, b,c must be passed by argument, and no extra arguments are allowed.
kwonly(1,b = 2,c = 3) is correct
kwonly(a = 1,b = 2,c = 3) is correct
kwonly(c= 1,a = 2,b = 3) is correct
kwonly(1,2,3) error
2. Keyword passing can appear as a default value. And there is a default value of the keyword passed parameters can not pass parameters
3. No two * may appear
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