mypy: zulip_bots: Fix errors in setup.py.

tools/run-mypy

@@ -22,7 +22,6 @@ exclude = """
 zulip/integrations/perforce/git_p4.py
 
 zulip_bots/zulip_bots/bots
-zulip_bots/setup.py
 zulip_bots/zulip_bots/lib.py
 zulip_bots/zulip_bots/provision.py
 zulip_bots/zulip_bots/run.py

zulip_bots/generate_manifest.py

@@ -5,7 +5,8 @@ import os
 import glob
 import distutils.cmd
 import distutils.log
-from typing import IO, Iterator
+if False:
+    from typing import IO, Iterator
 
 CURRENT_DIR = os.path.abspath(os.path.dirname(__file__))
 BOTS_DIR = os.path.normpath(os.path.join(CURRENT_DIR, 'zulip_bots', 'bots'))

zulip_bots/setup.py

@@ -5,6 +5,8 @@ from __future__ import print_function
 
 import os
 import sys
+if False:
+    from typing import Any, Dict, Optional
 
 import generate_manifest
 
@@ -63,14 +65,15 @@ except ImportError:
 
     # Manual dependency check
     def check_dependency_manually(module_name, version=None):
+        # type: (str, Optional[str]) -> None
         try:
-            module = import_module(module_name)
+            module = import_module(module_name)  # type: Any
             if version is not None:
                 assert(LooseVersion(module.__version__) >= LooseVersion(version))
         except (ImportError, AssertionError):
             if version is not None:
                 print("{name}>={version} is not installed.".format(
-                    req=req, version=version), file=sys.stderr)
+                    name=module_name, version=version), file=sys.stderr)
             else:
                 print("{name} is not installed.".format(name=module_name), file=sys.stderr)
             sys.exit(1)