Intermediate changes

commit_hash:6a1c19eb4925f3dd59db5299f1072962932c057b

Author: robot-piglet

yt/python/yt/common.py

@@ -38,6 +38,7 @@
 import sys
 import time
 import types
+import typing
 import string
 import warnings
 
@@ -47,6 +48,8 @@
 
 YT_NULL_TRANSACTION_ID = "0-0-0-0"
 
+_T = typing.TypeVar('_T')
+
 
 # Deprecation stuff.
 class YtDeprecationWarning(DeprecationWarning):
@@ -620,7 +623,7 @@ def require(condition, exception_func):
         raise exception_func()
 
 
-def update_inplace(object, patch):
+def update_inplace(object: _T, patch) -> _T:
     """Apply patch to object inplace"""
     if isinstance(patch, Mapping) and isinstance(object, Mapping):
         for key, value in iteritems(patch):
@@ -639,7 +642,7 @@ def update_inplace(object, patch):
     return object
 
 
-def update(object, patch):
+def update(object: _T, patch) -> _T:
     """Apply patch to object without modifying original object or patch"""
     if patch is None:
         return copy.deepcopy(object)