When I use the Python ast package to get the functions of Python files, I find the functions defined in the body of `if` statement cannot be recognized.

Here is my code:
with open(py_file, 'r') as f:
    data = f.read()
    module = ast.parse(data)
    func_def = [node for node in module.body if isinstance(node, ast.FunctionDef)]

Here is an example of Python file:
if supports_bytes_environ:
    def _check_bytes(value):
        if not isinstance(value, bytes):
            raise TypeError("bytes expected, not %s" % type(value).__name__)
        return value

The function `_check_bytes` is not in `func_def`. I also tested `ast.iter_child_nodes(module)` and it also has this issue.

I'm not sure whether I should file this issue here or on Github and I'm not an expert on this so I think I cannot contribute to this but only report to you.

This is the right place to file an issue.

Your code is incorrect; it will find only top-level functions. Functions within an `if` statement will be nested inside an `ast.If` node. To find all functions in a file, you'll need to recurse into nested nodes. For example, you could use `ast.walk`, an `ast.NodeVisitor`, or manually check for nodes like `ast.If`. Which one is best depends on your needs. For example, the first two will also find methods in classes. The ast module documentation has more information.

I see. It's my misunderstanding. Thank you for your help!