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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 _format_command_usage(commands):
 """ Construct the Commands-part of the usage text. Parameters commands : dict[str, func] dictionary of supported commands. Each entry should be a tuple of (name, function). Returns ------- str Text formatted as a description of the commands. """

    if not commands:
        return ""
    command_usage = "\nCommands:\n"
    cmd_len = max([len(c) for c in commands] + [8])
    command_doc = OrderedDict(
        [(cmd_name, _get_first_line_of_docstring(cmd_doc))
         for cmd_name, cmd_doc in commands.items()])
    for cmd_name, cmd_doc in command_doc.items():
        command_usage += ("  {:%d}  {}\n" % cmd_len).format(cmd_name, cmd_doc)
    return command_usage