Add this to the end of `os.py`. This fixes the "from os import urandom as _urandom ImportError: cannot import name urandom" issue.

gistfile1.py

if not _exists("urandom"):
    def urandom(n):
        """urandom(n) -> str

        Return a string of n random bytes suitable for cryptographic use.

        """
        try:
            _urandomfd = open("/dev/urandom", O_RDONLY)
        except (OSError, IOError):
            raise NotImplementedError("/dev/urandom (or equivalent) not found")
        try:
            bs = b""
            while n - len(bs) >= 1:
                bs += read(_urandomfd, n - len(bs))
        finally:
            close(_urandomfd)
        return bs