def replace_argument(script, from_, to):
 replaced_in_the_end = re.sub(u' {}$'.format(re.escape(from_)), u' {}'.format(to), script, count=1)
 if (replaced_in_the_end != script):
  return replaced_in_the_end
 else:
  return script.replace(u' {} '.format(from_), u' {} '.format(to), 1)

def replace_argument ( script , from_ , to ) : replaced_in_the_end = re . sub ( u' {}$' . format ( re . escape ( from_ ) ) , u' {}' . format ( to ) , script , count = 1 ) if ( replaced_in_the_end != script ) : return replaced_in_the_end else : return script . replace ( u' {} ' . format ( from_ ) , u' {} ' . format ( to ) , 1 )
replaces command line argument .