What is the Python AST module and how can I use it?

What is the Python AST module and how can I use it?

The Python AST (Abstract Syntax Tree) module allows you to interact with Python code as a tree structure. You can parse, analyze, and modify Python code programmatically.

Can you give me an example of how to parse a simple Python expression?

Sure! You can use ast.parse() to convert a Python expression into an AST. For example:

import ast

code = 'x + 1'
parsed_code = ast.parse(code)
print(ast.dump(parsed_code))

What can I do with the AST once I have it?

With the AST, you can analyze the structure of the code, transform it, or even generate new code. For instance, you can walk through the tree and modify nodes.

Are there any libraries that work well with the AST module?

Yes, libraries like astor can help you convert AST back to source code, and typed_ast can provide type annotations.