Add encoding and __future__ imports to all .py files in a repo.

gistfile1.txt

import subprocess
import shlex
files = subprocess.check_output(shlex.split('git ls-files --full-name')).strip().split('\n')
py_files = [file for file in files if file.endswith(".py")]
len(py_files)
new_header = '# -*- coding: utf-8 -*-\nfrom __future__ import unicode_literals\n'
for the_file in py_files:
    read_file = open(the_file, 'r')
    lines = list(read_file)
    result_lines = []
    for line in lines:
        if 'coding: utf-8' in line:
            continue
        if 'from __future__ import unicode_literals' in line:
            continue
        result_lines.append(line)
    read_file.close()
    if result_lines and 'bin' in result_lines[0]:
        # First line is shebang
        result_lines.insert(1, new_header)
    else:
        result_lines.insert(0, new_header)
    write_file = open(the_file, 'w')
    write_file.write(''.join(result_lines))
    write_file.close()