Day12_ parametric files into two-dimensional arrays

The contents of the parametric file are shown in this way.
Nhy,123456,true
Ssj,123456,true
Ssj,123456,false

Turn this format into a two-dimensional array, in the following format:

[
   [' Nhy ', ' 123456 ', ' True '],
   
   [' SSJ ', ' 123456 ', ' True '],

   [' SSJ ', ' 123456 ', ' True ']

]

def readcvs (file,sep = ', '): # Sep is represented by, for delimiter
    Lis = []
    With open (file, ' RB ') as F: # RB is what format can be compatible without error
        For line in F: # line is bytes type
            Sub_str = Line.decode (). Strip (). Split (Sep) # loop parametric file each line has a newline character, decode to strip after
            Lis.append (SUB_STR)
    return LIS

Day12_ parametric files into two-dimensional arrays