findUnicodeFont

#copy form https://superuser.com/questions/876572/how-do-i-find-out-which-font-contains-a-certain-special-character
import unicodedata
import os

fonts = []

for root,dirs,files in os.walk("/usr/share/fonts/"):
    for file in files:
       if file.endswith(".ttf"): fonts.append(os.path.join(root,file))
       if file.endswith(".otf"): fonts.append(os.path.join(root,file))

for root,dirs,files in os.walk("/home/charles/.local/share/fonts/"):
    for file in files:
       if file.endswith(".ttf"): fonts.append(os.path.join(root,file))
       if file.endswith(".otf"): fonts.append(os.path.join(root,file))

from fontTools.ttLib import TTFont

def char_in_font(unicode_char, font):
    for cmap in font['cmap'].tables:
        if cmap.isUnicode():
            if ord(unicode_char) in cmap.cmap:
                return True
    return False

def test(char):
    for fontpath in fonts:
        font = TTFont(fontpath)   # specify the path to the font in question
        if char_in_font(char, font):
            try:
                print(char + " " + unicodedata.name(char) + " in " + fontpath) 
            except ValueError as ve:
                print(char + " in " + fontpath)

test(u"●")
test(u"\u1F63A")
test(u"\u1F408")
test(u"")
test(u"")