Append '_new' to font names

change_font_name.py

import os
import sys
from glob import glob
from fontTools.ttLib import TTFont
import re

NAME_SUFFIX = '_new'
NAME_ENTRIES = [
    (1, 0, 0), # Mac
    (3, 1, 1033)
]


def main(folder):
    fonts_paths = []
    for file in os.listdir(folder):
        if 'ttf' in file:
            fonts_paths.append(file)

    for font_path in fonts_paths:
        font = TTFont(os.path.join(folder,font_path))
        new_filename = font_path[:-4] + NAME_SUFFIX + font_path[-4:]

        old_fam_name = str(font['name'].getName(1, 1, 0, 0)).decode(font['name'].getName(1, 1, 0, 0).getEncoding())
        old_ps_name = str(font['name'].getName(6, 1, 0, 0)).decode(font['name'].getName(6, 1, 0, 0).getEncoding())


        for field in font['name'].names:
            text = str(field).decode(field.getEncoding())

            # form = old_fam_name.encode(field.getEncoding())
            if old_fam_name in text:
                new_fam_name = re.sub(old_fam_name, old_fam_name + NAME_SUFFIX, text)
                font['name'].setName(new_fam_name, field.nameID, field.platformID, field.platEncID, field.langID)
            elif old_ps_name in text:

                new_ps_name = re.sub(old_ps_name, old_ps_name.split('-')[0] + NAME_SUFFIX + '-' + ''.join(old_ps_name.split('-')[1:]), text)
                font['name'].setName(new_ps_name, field.nameID, field.platformID, field.platEncID, field.langID)


        for field in font['name'].names:
            print field
        font.save(os.path.join(folder, new_filename))
        print 'saved %s' % os.path.join(folder, new_filename)


if __name__ == '__main__':
    if len(sys.argv) != 2:
        print '\nERROR: please include a path to the folder containing the fonts'
    else:
        folder = sys.argv[-1]
        main(folder)