#!/usr/bin/env python3

# Fix Python script(s) to reference the interpreter via /usr/bin/env python.
# Warning: this overwrites the file without making a backup.

import sys
import re


def main():
 for filename in sys.argv[1:]:
 try:
 f = open(filename, 'r')
 except IOError as msg:
 print(filename, ': can\'t open :', msg)
 continue
 line = f.readline()
 if not re.match('^#! */usr/local/bin/python', line):
 print(filename, ': not a /usr/local/bin/python script')
 f.close()
 continue
 rest = f.read()
 f.close()
 line = re.sub('/usr/local/bin/python',
 '/usr/bin/env python', line)
 print(filename, ':', repr(line))
 f = open(filename, "w")
 f.write(line)
 f.write(rest)
 f.close()

if __name__ == '__main__':
 main()