ansi_to_utf8.py

import os, subprocess

# Convert from ANSI (Windows-1251) to UTF-8 using iconv.
# http://gnuwin32.sourceforge.net/packages/libiconv.htm
file = "your_file_here"

command = ["C:\\Program Files (x86)\\GnuWin32\\bin\\iconv.exe",
           "-f cp1251", # Could also be cp1252 or other encoding types.
           "-t utf-8",
           '"' + file + '"']

with open(file + ".new", "w", encoding="utf-8") as modified:
    subprocess.Popen(" ".join(command), stdout=modified).wait()

os.remove(file)
os.rename(file + '.new', file)