<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_options_from_group(option_group):
 """ Take an option group and return all the options that are defined in that group. """

    option_list = option_group._group_actions
    command_lines = []
    for option in option_list:
        option_strings = option.option_strings
        for string in option_strings:
            if string.startswith('--'):
                command_lines.append(string)
    return command_lines