1 files changed, 5 insertions, 3 deletions

diff --git a/libmat2/parser_factory.py b/libmat2/parser_factory.py
index 2f6acc1..42d20de 100644
--- a/libmat2/parser_factory.py
+++ b/libmat2/parser_factory.py
@@ -2,10 +2,12 @@ import glob
 import os
 import mimetypes
 import importlib
-from typing import TypeVar, List
+from typing import TypeVar, List, Tuple, Optional
 
 from . import abstract, unsupported_extensions
 
+assert Tuple  # make pyflakes happy
+
 T = TypeVar('T', bound='abstract.AbstractParser')
 
 def __load_all_parsers():
@@ -28,14 +30,14 @@ def _get_parsers() -> List[T]:
     return __get_parsers(abstract.AbstractParser)
 
 
-def get_parser(filename: str) -> (T, str):
+def get_parser(filename: str) -> Tuple[Optional[T], Optional[str]]:
     mtype, _ = mimetypes.guess_type(filename)
 
     _, extension = os.path.splitext(filename)
     if extension in unsupported_extensions:
         return None, mtype
 
-    for c in _get_parsers():
+    for c in _get_parsers():  # type: ignore
         if mtype in c.mimetypes:
             try:
                 return c(filename), mtype