latex2sympy

latex2sympy parses LaTeX math expressions and converts them into the equivalent SymPy form.

Installation

sh scripts/setup.sh

If you plan to edit the parser grammar, ensure you have java installed on your machine.

Compiling

The script below should be run every time the file LATEX.g4 or src/latex2sympy/latex2antlrJson.cpp are modified.

sh scripts/compile.sh

Optionally, you can append the -n option for "no clean", which will not completely delete the old build files, allowing for faster development.

sh scripts/compile.sh -n

Pre-compiled parsers are stored in src/latex2sympy/lib. src/latex2sympy/lib/linux contains the parser used in azure functions (see below).

compile.sh will only compile for the current system.

macOS arm64

Run compile.sh on an M1 Mac

macOS x86_64

Run compile.sh on an Intel Mac, or inside a "Rosetta" Terminal on an M1 Mac

azure-functions-python / Debian GNU / Linux 11

1. Use docker to get the azure function image from https://hub.docker.com/_/microsoft-azure-functions-python, e.g. mcr.microsoft.com/azure-functions/python:4-python3.9
2. Start a new instance and open its terminal
3. Install git, build-essentials, default-jre

   apt-get update && \
   apt-get upgrade -y && \
   apt-get install -y git && \
   apt-get install -y build-essential && \
   apt-get install -y default-jre
   

4. clone latex2sympy with git and compile

   # make a dir for the repo
   cd /
   mkdir git
   cd git
   # clone repo
   git clone https://github.com/purdue-tlt/latex2sympy.git
   cd latex2sympy
   # setup venv
   sh scripts/setup.sh
   # compile
   sh scripts/compile.sh

5. copy latex2antlrJson.so from container

   docker cp container_name:/git/latex2sympy/src/latex2sympy/lib/linux/latex2antlrJson.so ~/git/purdue/github/latex2sympy/src/latex2sympy/lib/linux/

6. commit the updated file

Testing

sh scripts/test.sh

Usage

In Python:

from latex2sympy.latex2sympy import process_sympy

process_sympy("\\frac{d}{dx} x^{2}")
# => "diff(x**(2), x)"

To modify parser grammar, view the existing structure in LATEX.g4.

To modify the action associated with each grammar, look into src/latex2sympy/latex2antlrJson.cpp and src/latex2sympy/latex2sympy.py.