nerd-fonts/bin/scripts/name_parser/query_names

#!/usr/bin/env python3
# coding=utf8

import sys
import os.path
import fontforge

###### Some helpers

def get_sfnt_dict(font):
    """Extract SFNT table as nice dict"""
    return { k: v for l, k, v in font.sfnt_names }

def format_names(header, *stuff):
    """Unify outputs (with header)"""
    f = '{:1.1}|{:50.50} |{:1.1}| {:65.65} |{:1.1}| {:55.55} |{:1.1}| {:30.30} |{:1.1}| {:40.40} |{:1.1}| {:.40}'
    if header:
        d = '------------------------------------------------------------'
        return f.format(*stuff) + '\n' + f.format('', d, d, d, d, d, d, d, d, d, d, d)
    return f.format(*stuff).rstrip()

###### Let's go!

if len(sys.argv) < 2:
    print('Usage: {} font_name [font_name ...]\n'.format(sys.argv[0]))
    sys.exit(1)

print('Examining {} font files'.format(len(sys.argv) - 1))

print(format_names(True, '', 'Filename', '', 'Fullname', '', 'Family', '', 'Subfamily', '', 'Typogr. Family', '', 'Typogr. Subfamily'))

for filename in sys.argv[1:]:
    fullfile = os.path.basename(filename)
    fname = os.path.splitext(fullfile)[0]

    font = fontforge.open(filename, 1)
    sfnt = get_sfnt_dict(font)
    font.close()

    sfnt_full =    sfnt['Fullname']
    sfnt_fam =     sfnt['Family']
    sfnt_subfam =  sfnt['SubFamily']
    sfnt_pfam =    sfnt['Preferred Family'] if 'Preferred Family' in sfnt else ''
    sfnt_psubfam = sfnt['Preferred Styles'] if 'Preferred Styles' in sfnt else ''

    o2 = format_names(False, '', fullfile, '', sfnt_full, '', sfnt_fam, '', sfnt_subfam, '', sfnt_pfam, '', sfnt_psubfam)

    print(o2)