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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 gen_input_add(sig_dic):
    '''
    Adding for HTML Input control.
    '''
    if sig_dic['en'] == 'tag_file_download':
        html_str = HTML_TPL_DICT['input_add_download'].format(
            sig_en=sig_dic['en'],
            sig_zh=sig_dic['zh'],
            sig_dic=sig_dic['dic'][1],
            sig_type=sig_dic['type']
        )
    else:
        html_str = HTML_TPL_DICT['input_add'].format(
            sig_en=sig_dic['en'],
            sig_zh=sig_dic['zh'],
            sig_dic=sig_dic['dic'][1],
            sig_type=sig_dic['type']
        )
    return html_str