What do you mean by'\'in the argument of the Python function?

What does the"/"in the < H2 > Python function argument mean? < / H2 >

encountered here, this is the source code: 

>>>import  sys
>>>sys.std.readlines()
>>> -sharp ["/" makes preceding arguments as positional-only]


Xiaobai asks for an answer. If Python has an official explanation, please send me a link by the way. Thank you!

Python
May.12,2021

reference document PEP 457-- Syntax For Positional-Only Parameters
python.org/dev/peps/pep-0457/" rel=" nofollow noreferrer "> https://www.python.org/dev/pe.

There are two parameters for

python

  1. position parameter (positional argument)
  2. keyword parameter (keyword argument)

such as def foo (a, bread1): pass , where a is the position parameter and b is the keyword parameter.

two other common definitions, such as 

def sum(*args):
    pass
    
def option(**kwargs):
    pass

where args represents a parameter array (list type), and kwargs represents a parameter dictionary (dict type).
the corresponding calling method, such as 

sum(1, 2)
option(a=1, b=2)

finally, def readlines (hints=-1, /): pass , where / does not represent any parameters, it indicates that the preceding parameters are positional parameters, and there are no keyword parameters. So readlines (1) can, but readlines (hints=1) cannot.
currently (August 29th, 2018), this syntax is only defined in python C, and python has not yet been implemented.

"python.org/dev/peps/pep-0457/" rel= "nofollow noreferrer" > https://www.python.org/dev/pe. "
is going to climb the wall.
in fact, I don't quite understand, positional argument. It probably means that it is sorted according to the rules, and you can't arrange it at will with arg=1 or (a ~) or (~) ~
that forward slash, that is, the forward slash def func (a _ mlmple _ rem _ b) indicates that the preceding parameter is positional only argmument.
however, I don't understand how this kind of syntax can be run, because slashes generally cannot be used as parameters. I hope someone can help me with the answer.
maybe this is just a hint on the document, right?
by the way, there is a difference between sys.stdin.readlines (1) and sys.stdin.readlines (- 1) on idle. The former ends the input state after I type characters and wraps the line directly, while the latter I need ctrl+D to finish.

Previous: The HttpServer created by Java returns json data

Next: How can arrays be superimposed and merged if the array has the same ID and different numbers?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
© 2021 CodesHelper
Advertising Contact us About us
Menu