Make MyPy happy

src/treq/_cgi.py

@@ -61,8 +61,10 @@
 # [1]: https://github.com/python/cpython/blob/60edc70a9374f1cc6ecff5974e438d58fec29985/Lib/cgi.py
 # [2]: https://github.com/python/cpython/blob/60edc70a9374f1cc6ecff5974e438d58fec29985/LICENSE#L73
 
+from typing import Dict, Iterator, Tuple
 
-def _parseparam(s):
+
+def _parseparam(s: str) -> Iterator[str]:
     while s[:1] == ';':
         s = s[1:]
         end = s.find(';')
@@ -75,7 +77,7 @@ def _parseparam(s):
         s = s[end:]
 
 
-def parse_header(line):
+def parse_header(line: str) -> Tuple[str, Dict[str, str]]:
     """Parse a Content-type like header.
 
     Return the main content-type and a dictionary of options.

src/treq/test/test_content.py

@@ -1,5 +1,6 @@
 import unittest
 from unittest import mock
+from typing import Optional
 
 from twisted.python.failure import Failure
 
@@ -273,7 +274,7 @@ def error(data):
 
 
 class EncodingFromHeadersTests(unittest.TestCase):
-    def _encodingFromContentType(self, content_type: str) -> str | None:
+    def _encodingFromContentType(self, content_type: str) -> Optional[str]:
         """
         Invoke `_encoding_from_headers()` for a header value.
 

src/treq/test/test_multipart.py

@@ -5,7 +5,7 @@
 
 from io import BytesIO
 
-from multipart import MultipartParser
+from multipart import MultipartParser  # type: ignore
 from twisted.trial import unittest
 from zope.interface.verify import verifyObject