This code defines three functions: prime_factors to calculate the unique prime factors of a number, overlap to remove duplicate elements from two lists, and uses these functions to calculate the product of unique prime factors of numbers from 1 to 20. The functions are then exported as part of the module, making them available for import by other modules.
The code imports necessary libraries and sets up ANTLR directory to parse C language code, and defines a custom FunctionExtractor class to extract function names from the parsed code. A get_functions function is then defined to take a code string as input, parse it using ANTLR, and extract function names using the FunctionExtractor class.
The Node.js module provides a function pythonParams that uses the ANTLR4 tool to parse Python code and extract function parameters, returning them as an array of objects.
And here's a slightly expanded version in two sentences:
This Node.js module uses the ANTLR4 tool to parse Python code and extract function parameters, which are then returned as an array of objects. The module exports a single function, pythonParams, which can be used to analyze Python code and extract function parameter information.