Converts wide string to string

wchar_to_char.py

#!/usr/bin/python
# CC-BY: hasherezade
"""Convert wchar string to char string"""

import argparse

def convert(data):
    maxlen = len(data)
    decoded = bytearray()
    i = 0
    while i < maxlen:
        dec = data[i]
        decoded.append(dec) 
        i += 2     
    return decoded

def main():
    parser = argparse.ArgumentParser(description="Converts wchar string to char string")
    parser.add_argument('--file', dest="file", default=None, help="Input file", required=True)
    args = parser.parse_args()
    
    fp = open(args.file, 'rb')
    if fp is None:
        print "[-] Failed to open file"
        return (-1)
    data = fp.read()
    fp.close()
    decoded = convert(data)
    print decoded

if __name__ == "__main__":
    main()