How to use the shodan.cli.helpers.get_banner_field function in shodan

if datadir:
                    cur_time = timestr()
                    if cur_time != last_time:
                        last_time = cur_time
                        fout.close()
                        fout = open_streaming_file(datadir, last_time)
                    helpers.write_banner(fout, banner)

                # Print the banner information to stdout
                if not quiet:
                    row = u''

                    # Loop over all the fields and print the banner as a row
                    for field in fields:
                        tmp = u''
                        value = get_banner_field(banner, field)
                        if value:
                            field_type = type(value)

                            # If the field is an array then merge it together
                            if field_type == list:
                                tmp = u';'.join(value)
                            elif field_type in [int, float]:
                                tmp = u'{}'.format(value)
                            else:
                                tmp = escape_data(value)

                            # Colorize certain fields if the user wants it
                            if color:
                                tmp = click.style(tmp, fg=COLORIZE_FIELDS.get(field, 'white'))

                            # Add the field information to the row

for banner in helpers.iterate_files(filenames):
        row = u''

        # Validate the banner against any provided filters
        if has_filters and not match_filters(banner, filters):
            continue

        # Append the data
        if fout:
            helpers.write_banner(fout, banner)

        # Loop over all the fields and print the banner as a row
        for i, field in enumerate(fields):
            tmp = u''
            value = get_banner_field(banner, field)
            if value:
                field_type = type(value)

                # If the field is an array then merge it together
                if field_type == list:
                    tmp = u';'.join(value)
                elif field_type in [int, float]:
                    tmp = u'{}'.format(value)
                else:
                    tmp = escape_data(value)

                # Colorize certain fields if the user wants it
                if color:
                    tmp = click.style(tmp, fg=COLORIZE_FIELDS.get(field, 'white'))

            # Add the field information to the row

except shodan.APIError as e:
        raise click.ClickException(e.value)

    # Error out if no results were found
    if results['total'] == 0:
        raise click.ClickException('No search results found')

    # We buffer the entire output so we can use click's pager functionality
    output = u''
    for banner in results['matches']:
        row = u''

        # Loop over all the fields and print the banner as a row
        for field in fields:
            tmp = u''
            value = get_banner_field(banner, field)
            if value:
                field_type = type(value)

                # If the field is an array then merge it together
                if field_type == list:
                    tmp = u';'.join(value)
                elif field_type in [int, float]:
                    tmp = u'{}'.format(value)
                else:
                    tmp = escape_data(value)

                # Colorize certain fields if the user wants it
                if color:
                    tmp = click.style(tmp, fg=COLORIZE_FIELDS.get(field, 'white'))

                # Add the field information to the row