Run commands with ssh even if arguments contain spaces

ssh.py

import subprocess
import shlex

if hasattr(shlex, "quote"):
    # Python 3
    shquote = shlex.quote
else:
    # Backport of shlex.quote for Python 2
    import re
    _find_unsafe = re.compile(r'[^\w@%+=:,./-]').search

    def shquote(s):
        """Return a shell-escaped version of the string *s*."""
        if not s:
            return "''"
        if _find_unsafe(s) is None:
            return s

        # use single quotes, and put single quotes into double quotes
        # the string $'b is then quoted as '$'"'"'b'
        return "'" + s.replace("'", "'\"'\"'") + "'"

def ssh(machine, args):
    escaped_args = " ".join(shquote(a) for a in args)
    return subprocess.call(["ssh", machine, escaped_args])