$ pyvenv env
$ source env/bin/activate
$ pip install libclang-py3

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# python dump_tree_py3.py test.m

import sys
import clang.cindex
from clang.cindex import Config

Config.set_compatibility_check(False)
Config.set_library_file("/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libclang.dylib")

def visit_node(node, indent=0):
	print('%s%s : %s' % (' ' * indent, node.kind.name, node.spelling))
	for c in node.get_children():
		visit_node(c, indent=indent+1)

index = clang.cindex.Index.create()
tree = index.parse(sys.argv[1])
visit_node(tree.cursor)

$ python dump_tree_py3.py src.c