Add small bits of typing annotation (#4954)

1 files changed, 7 insertions, 5 deletions

diff --git a/pylint/utils/pragma_parser.py b/pylint/utils/pragma_parser.py
index cbff8b26a..f1c1c2224 100644
--- a/pylint/utils/pragma_parser.py
+++ b/pylint/utils/pragma_parser.py
@@ -3,7 +3,7 @@
 
 import re
 from collections import namedtuple
-from typing import Generator, List
+from typing import Generator, List, Optional
 
 # Allow stopping after the first semicolon/hash encountered,
 # so that an option can be continued with the reasons
@@ -52,7 +52,7 @@ TOK_REGEX = "|".join(
 )
 
 
-def emit_pragma_representer(action, messages):
+def emit_pragma_representer(action: str, messages: List[str]) -> PragmaRepresenter:
     if not messages and action in MESSAGE_KEYWORDS:
         raise InvalidPragmaError(
             "The keyword is not followed by message identifier", action
@@ -65,7 +65,7 @@ class PragmaParserError(Exception):
     A class for exceptions thrown by pragma_parser module
     """
 
-    def __init__(self, message, token):
+    def __init__(self, message: str, token: str) -> None:
         """
         :args message: explain the reason why the exception has been thrown
         :args token: token concerned by the exception
@@ -88,7 +88,7 @@ class InvalidPragmaError(PragmaParserError):
 
 
 def parse_pragma(pylint_pragma: str) -> Generator[PragmaRepresenter, None, None]:
-    action = None
+    action: Optional[str] = None
     messages: List[str] = []
     assignment_required = False
     previous_token = ""
@@ -113,7 +113,9 @@ def parse_pragma(pylint_pragma: str) -> Generator[PragmaRepresenter, None, None]
                 raise InvalidPragmaError("Missing keyword before assignment", "")
             assignment_required = False
         elif assignment_required:
-            raise InvalidPragmaError("The = sign is missing after the keyword", action)
+            raise InvalidPragmaError(
+                "The = sign is missing after the keyword", action or ""
+            )
         elif kind == "KEYWORD":
             if action:
                 yield emit_pragma_representer(action, messages)