Add type hints to satisfy ty (#622)

Author: dbieber

fire/inspectutils.py

@@ -269,12 +269,12 @@ def Info(component):
 
   try:
     unused_code, lineindex = inspect.findsource(component)
-    info['line'] = lineindex + 1
+    info['line'] = lineindex + 1  # type: ignore
   except (TypeError, OSError):
-    info['line'] = None
+    info['line'] = None  # type: ignore
 
   if 'docstring' in info:
-    info['docstring_info'] = docstrings.parse(info['docstring'])
+    info['docstring_info'] = docstrings.parse(info['docstring'])  # type: ignore
 
   return info
 

fire/parser.py

@@ -19,7 +19,7 @@
 import sys
 
 if sys.version_info[0:2] < (3, 8):
-  _StrNode = ast.Str
+  _StrNode = ast.Str  # type: ignore  # deprecated but needed for Python < 3.8
 else:
   _StrNode = ast.Constant