@Jo Parser generators sure exist. They take in grammar specs and generate parsers for that grammar. But the idea here is that we create our own custom generator framework which takes in a predefined type of rules(grammar) and then takes advantage of the similarities between the different Languages such as Mathematica or MathML to create a parser that parses the expression to sympy code. Please take a look at the mathematica.py module in sympy/sympy/parsing folder. That is a parser for mathematica language. But it has had to be coded by hand. What I intend to implement is a program that takes in a few details about the differences between the language and sympy and automatically generates the code that converts the expression. Please do note that here the term "parser" that I am referring to is not the exact "parser" that we have for other languages. It is more of an interpreter sort of thing and I want to make the program that creates those interpreters.
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