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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def isalive(path):
 """ Returns True if the file with the given name contains a process id that is still alive. Returns False otherwise. :type path: str :param path: The name of the pidfile. :rtype: bool :return: Whether the process is alive. """

    # try to read the pid from the pidfile
    pid = read(path)
    if pid is None:
        return False

    # Check if a process with the given pid exists.
    try:
        os.kill(pid, 0)  # Signal 0 does not kill, but check.
    except OSError as xxx_todo_changeme1:
        (code, text) = xxx_todo_changeme1.args
        if code == errno.ESRCH:  # No such process.
            return False
    return True