mypy: Add annotations for help.

tools/run-mypy

@@ -44,6 +44,8 @@ force_include = [
     "zulip_bots/zulip_bots/bots/github_detail/test_github_detail.py",
     "zulip_bots/zulip_bots/bots/googlesearch/googlesearch.py",
     "zulip_bots/zulip_bots/bots/googlesearch/test_googlesearch.py",
+    "zulip_bots/zulip_bots/bots/help/help.py",
+    "zulip_bots/zulip_bots/bots/help/test_help.py",
 ]
 
 parser = argparse.ArgumentParser(description="Run mypy on files tracked by git.")

zulip_bots/zulip_bots/bots/help/help.py

@@ -1,7 +1,8 @@
 # See readme.md for instructions on running this code.
+from typing import Any, Dict
 
 class HelpHandler(object):
-    def usage(self):
+    def usage(self: Any) -> str:
         return '''
             This plugin will give info about Zulip to
             any user that types a message saying "help".
@@ -11,7 +12,7 @@ class HelpHandler(object):
             your Zulip instance.
             '''
 
-    def handle_message(self, message, bot_handler):
+    def handle_message(self: Any, message: Dict[str, str], bot_handler: Any) -> None:
         help_content = "Info on Zulip can be found here:\nhttps://github.com/zulip/zulip"
         bot_handler.send_reply(message, help_content)
 

zulip_bots/zulip_bots/bots/help/test_help.py

@@ -2,10 +2,12 @@
 
 from zulip_bots.test_lib import StubBotTestCase
 
+from typing import Any
+
 class TestHelpBot(StubBotTestCase):
     bot_name = "help"
 
-    def test_bot(self):
+    def test_bot(self: Any) -> None:
         help_text = "Info on Zulip can be found here:\nhttps://github.com/zulip/zulip"
         requests = ["", "help", "Hi, my name is abc"]