[Python] Add Custom Font to Matplotlib

custom_font_matplotlib.py

# Import Libraries
import matplotlib.font_manager as font_manager
import urllib.request
from tempfile import NamedTemporaryFile


def download_font(url: str, ttf_file: str, github: bool=True):
  # Download the Font
  font_url = f"{url}{ttf_file}{'?raw=true' if github else ''}"
  urllib.request.urlretrieve(font_url, ttf_file)

  # Add the Font to Matplotlib
  fonts = matplotlib.font_manager.findSystemFonts(fontpaths=".", fontext='ttf')
  for font_file in fonts:
      font_manager.fontManager.addfont(font_file)

# Download fonts
download_font("https://github.com/impallari/Raleway/blob/master/fonts/v3.000%20Fontlab/TTF/", "Raleway-ExtraLight.ttf")

# Apply the fonts
plt.rcParams['font.family'] = 'serif'
plt.rcParams['font.serif'] = 'Raleway'
plt.rcParams['size'] = 15