More type annotations.

1 files changed, 12 insertions, 2 deletions

diff --git a/bootstrap.py b/bootstrap.py
index e50cb38..98da78c 100644
--- a/bootstrap.py
+++ b/bootstrap.py
@@ -3,7 +3,9 @@
 import functools
 import logging
 import os
+import importlib
 from inspect import stack
+from typing import List
 import sys
 
 # This module is commonly used by others in here and should avoid
@@ -99,7 +101,7 @@ def handle_uncaught_exception(exc_type, exc_value, exc_tb):
                 original_hook(exc_type, exc_value, exc_tb)
 
 
-class ImportInterceptor(object):
+class ImportInterceptor(importlib.abc.MetaPathFinder):
     def __init__(self):
         import collect.trie
 
@@ -120,6 +122,11 @@ class ImportInterceptor(object):
     def should_ignore_filename(self, filename: str) -> bool:
         return 'importlib' in filename or 'six.py' in filename
 
+    def find_module(self, fullname, path):
+        raise Exception(
+            "This method has been deprecated since Python 3.4, please upgrade."
+        )
+
     def find_spec(self, loaded_module, path=None, target=None):
         s = stack()
         for x in range(3, len(s)):
@@ -147,6 +154,9 @@ class ImportInterceptor(object):
         logger.debug(msg)
         print(msg)
 
+    def invalidate_caches(self):
+        pass
+
     def find_importer(self, module: str):
         if module in self.tree_node_by_module:
             node = self.tree_node_by_module[module]
@@ -166,7 +176,7 @@ import_interceptor = None
 for arg in sys.argv:
     if arg == '--audit_import_events':
         import_interceptor = ImportInterceptor()
-        sys.meta_path = [import_interceptor] + sys.meta_path
+        sys.meta_path.insert(0, import_interceptor)
 
 
 def dump_all_objects() -> None: