diff --git a/python/cross_service/apigateway_covid-19_tracker/app.py b/python/cross_service/apigateway_covid-19_tracker/app.py
index f720f8672ab..b2b8999ac80 100644
--- a/python/cross_service/apigateway_covid-19_tracker/app.py
+++ b/python/cross_service/apigateway_covid-19_tracker/app.py
@@ -106,7 +106,7 @@ def state_cases(state):
     logger.info("Got %s to /states/%s.", app.current_request.method, state)
     logger.info("JSON body: %s", app.current_request.json_body)
 
-    state = urllib.parse.unquote(state)
+    state = urllib.parse.unquote_plus(state)
     verify_input(state, data=app.current_request.json_body)
 
     response = None
@@ -145,8 +145,8 @@ def state_date_cases(state, date):
     """
     logger.info("Got %s to /states/%s/%s.", app.current_request.method, state, date)
 
-    state = urllib.parse.unquote(state)
-    date = urllib.parse.unquote(date)
+    state = urllib.parse.unquote_plus(state)
+    date = urllib.parse.unquote_plus(date)
     verify_input(state, date=date)
 
     response = None
diff --git a/python/example_code/s3/s3_versioning/remove_delete_marker.py b/python/example_code/s3/s3_versioning/remove_delete_marker.py
index bb94feffb19..8fc29a20943 100644
--- a/python/example_code/s3/s3_versioning/remove_delete_marker.py
+++ b/python/example_code/s3/s3_versioning/remove_delete_marker.py
@@ -41,7 +41,7 @@ def lambda_handler(event, context):
     task_id = task["taskId"]
 
     try:
-        obj_key = parse.unquote(task["s3Key"], encoding="utf-8")
+        obj_key = parse.unquote_plus(task["s3Key"], encoding="utf-8")
         obj_version_id = task["s3VersionId"]
         bucket_name = task["s3BucketArn"].split(":")[-1]
 
diff --git a/python/example_code/s3/s3_versioning/revise_stanza.py b/python/example_code/s3/s3_versioning/revise_stanza.py
index 5ef032ac91f..e807f948248 100644
--- a/python/example_code/s3/s3_versioning/revise_stanza.py
+++ b/python/example_code/s3/s3_versioning/revise_stanza.py
@@ -39,7 +39,7 @@ def lambda_handler(event, context):
     task = event["tasks"][0]
     task_id = task["taskId"]
     # The revision type is packed with the object key as a pipe-delimited string.
-    obj_key, revision = parse.unquote(task["s3Key"], encoding="utf-8").split("|")
+    obj_key, revision = parse.unquote_plus(task["s3Key"], encoding="utf-8").split("|")
     bucket_name = task["s3BucketArn"].split(":")[-1]
 
     logger.info("Got task: apply revision %s to %s.", revision, obj_key)