How to parse the whole script in Python?

Question

How can I parse the whole python script? as the following:

test.py:

import app
import _ast
import ast
if __name__ == "__main__":
## as1t = compile("app.py","<string>","exec",_ast.PyCF_ONLY_AST)
 p = ast.parse("app.py")
 print(ast.dump(p))

It parses the String "app.py" instead of the actual script. How to realize it? Thank you very much!

Answer 1

ast.parse() expects the code text, not the file name:

import ast
with open('app.py') as fp:
 code = fp.read()
 tree = ast.parse(code)
 print ast.dump(tree)