python-ast

Python (3) Parser for JavaScript/TypeScript, based on antlr4ts, grammar taken from antlr4's python grammar too (so please report bugs and open pull requests related to grammars upstream)

Significantly based on java-ast - all credit to Urish

Usage Example

import { parse, createVisitor } from 'python-ast';

const countMethods = (source: string) => {
  let ast = parse(source);

  return createVisitor({
    visitFuncdef: () => 1,
    defaultResult: () => 0,
    aggregateResult: (a, b) => a + b,
  }).visit(ast);
};

console.log(
  countMethods(`
class A:
    a: int

    def b(self):
        pass
    
    def c(self):
        pass
class B:
    def z(self, i):
        pass
  `),
); // logs 3