what language used to make python code example

Example: python

from _future_ import print_function
import matplotlib.pyplot as plt
import os
import sys
import re
import gc

# Selection of features following "Writing mathematical expresion"tutorial
mathtext_tiles = {
    0: "Header demo"
    1: "Subscripts and superscripts"
    2: "Fraction ,bionomals and stacked numbers"
    3: "radicals"
    4: "Fonts"
    5: "Accents"
    6: "Greek Herbew"
    7: "Delimeters, functions and symbols"}
n_lines = len(mathtext_titles)