git clone https://github.com/augustt198/latex2sympy.git
cd latex2sympy
antlr4 PS.g4 -o gen

from process_latex import process_sympy
process_sympy("\frac{d}{dx} x^{2}")

Traceback (most recent call last):
  File "x.py", line 1, in <module>
    from process_latex import process_sympy
ImportError: No module named process_latex