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  1. import csv
  2. import fileinput
  3. import sys
  4.  
  5. reader = csv.reader(fileinput.input(inplace=True))  # modify input files inplace
  6. writer = csv.writer(sys.stdout)  # fileinput redirects stdout to input file
  7.                                                 # after input file has been copied to a temporary file
  8. for row in reader:
  9.      row += [row[-1]]  # duplicate last column
  10.      writer.writerow(row)
Success #stdin #stdout 0.09s 10904KB
comments (?)
stdin
copy 
a,b,c,1
d,e,f,2
stdout
copy 
a,b,c,1,1
d,e,f,2,2
https://ideone.com/nZfY2F
language:
Python (cpython 2.7.16)
created:
11 years ago
visibility:
secret

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