about one function that splits a string with several chars in python -

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This is a function that I have found on the internet, but I'm not sure that the line s, res = res , [] Meaning, can anyone explain this to me? Thanks a lot! S: res + = seq .split (sep) in SEC for def my_split (s, seps): res = [s] sps in SSP: s, res = res, [] Returns 

  s, res = res, []  < / Pre> 
 tool 
 
  s = res res = []  
 
 Replacement of variables in a row.

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