old_method_finder.py

from __future__ import print_function
import glob
import os
import re


old_method_syntax = re.compile('[A-Z][\w\d_]+\.[\w\d_]+\(self')
cwd = os.getcwd()

files = glob.glob(os.path.join(cwd, '*.py'))
files.extend(glob.glob(os.path.join(cwd, '*', '*.py')))
files.extend(glob.glob(os.path.join(cwd, '*', '*', '*.py')))
files.extend(glob.glob(os.path.join(cwd, '*', '*', '*', '*.py')))
files.extend(glob.glob(os.path.join(cwd, '*', '*', '*', '*', '*.py')))
files.extend(glob.glob(os.path.join(cwd, '*', '*', '*', '*', '*', '*.py')))
files.extend(glob.glob(os.path.join(cwd, '*', '*', '*', '*', '*', '*', '*.py')))

for search_me in files:
    with open(search_me, 'r') as search:
        for offset, line in enumerate(search):
            if old_method_syntax.search(line):
                print("{0} ({1}): {2}".format(
                    search_me.replace(cwd + '/', ''),
                    offset + 1,
                    line.strip()
                ))