PYTHON-3744 Fix utcnow deprecation build regressions

doc/examples/datetimes.rst

@@ -26,10 +26,10 @@ time into MongoDB:
 .. doctest::
 
    >>> result = db.objects.insert_one(
-   ...     {"last_modified": datetime.datetime.now(tz=timezone.utc)}
+   ...     {"last_modified": datetime.datetime.now(tz=datetime.timezone.utc)}
    ... )
 
-Always use :meth:`datetime.datetime.now(tz=timezone.utc)`, which explicitly returns the current time in
+Always use :meth:`datetime.datetime.now(tz=datetime.timezone.utc)`, which explicitly returns the current time in
 UTC, instead of :meth:`datetime.datetime.now`, with no arguments, which returns the current local
 time. Avoid doing this:
 

doc/tutorial.rst

@@ -109,7 +109,7 @@ post:
   ...     "author": "Mike",
   ...     "text": "My first blog post!",
   ...     "tags": ["mongodb", "python", "pymongo"],
-  ...     "date": datetime.datetime.now(tz=timezone.utc),
+  ...     "date": datetime.datetime.now(tz=datetime.timezone.utc),
   ... }
 
 Note that documents can contain native Python types (like

pymongo/ocsp_cache.py

@@ -61,7 +61,11 @@ def __setitem__(self, key, value):
                 return
 
             # Do nothing if the response is invalid.
-            if not (value.this_update <= _datetime.now(tz=timezone.utc) < value.next_update):
+            if not (
+                value.this_update
+                <= _datetime.now(tz=timezone.utc).replace(tzinfo=None)
+                < value.next_update
+            ):
                 return
 
             # Cache new response OR update cached response if new response
@@ -82,7 +86,11 @@ def __getitem__(self, item):
             value = self._data[cache_key]
 
             # Return cached response if it is still valid.
-            if value.this_update <= _datetime.now(tz=timezone.utc) < value.next_update:
+            if (
+                value.this_update
+                <= _datetime.now(tz=timezone.utc).replace(tzinfo=None)
+                < value.next_update
+            ):
                 return value
 
             self._data.pop(cache_key, None)

pymongo/ocsp_support.py

@@ -220,7 +220,7 @@ def _verify_response(issuer, response):
 
     # Note that we are not using a "tolerance period" as discussed in
     # https://tools.ietf.org/rfc/rfc5019.txt?
-    now = _datetime.now(tz=timezone.utc)
+    now = _datetime.now(tz=timezone.utc).replace(tzinfo=None)
     # RFC6960, Section 3.2, Number 5
     if response.this_update > now:
         _LOGGER.debug("thisUpdate is in the future")

test/test_ocsp_cache.py

@@ -61,7 +61,7 @@ def _create_mock_request(self):
         )
 
     def _create_mock_response(self, this_update_delta_seconds, next_update_delta_seconds):
-        now = datetime.now(tz=timezone.utc)
+        now = datetime.now(tz=timezone.utc).replace(tzinfo=None)
         this_update = now + timedelta(seconds=this_update_delta_seconds)
         if next_update_delta_seconds is not None:
             next_update = now + timedelta(seconds=next_update_delta_seconds)