docs(example): Avoid UnboundLocalError for get_object when exception (#1442)

Author: 100gle

examples/get_object.py

@@ -24,41 +24,49 @@
 )
 
 # Get data of an object.
+response = None
 try:
     response = client.get_object("my-bucket", "my-object")
     # Read data from response.
 finally:
-    response.close()
-    response.release_conn()
+    if response:
+        response.close()
+        response.release_conn()
 
 # Get data of an object of version-ID.
+response = None
 try:
     response = client.get_object(
         "my-bucket", "my-object",
         version_id="dfbd25b3-abec-4184-a4e8-5a35a5c1174d",
     )
     # Read data from response.
 finally:
-    response.close()
-    response.release_conn()
+    if response:
+        response.close()
+        response.release_conn()
 
 # Get data of an object from offset and length.
+response = None
 try:
     response = client.get_object(
         "my-bucket", "my-object", offset=512, length=1024,
     )
     # Read data from response.
 finally:
-    response.close()
-    response.release_conn()
+    if response:
+        response.close()
+        response.release_conn()
 
 # Get data of an SSE-C encrypted object.
+response = None
 try:
     response = client.get_object(
         "my-bucket", "my-object",
         ssec=SseCustomerKey(b"32byteslongsecretkeymustprovided"),
     )
     # Read data from response.
 finally:
-    response.close()
-    response.release_conn()
+    if response:
+        response.close()
+        response.release_conn()

minio/api.py

@@ -1187,44 +1187,52 @@ def get_object(
 
         Example::
             # Get data of an object.
+            response = None
             try:
                 response = client.get_object("my-bucket", "my-object")
                 # Read data from response.
             finally:
-                response.close()
-                response.release_conn()
+                if response:
+                    response.close()
+                    response.release_conn()
 
             # Get data of an object of version-ID.
+            response = None
             try:
                 response = client.get_object(
                     "my-bucket", "my-object",
                     version_id="dfbd25b3-abec-4184-a4e8-5a35a5c1174d",
                 )
                 # Read data from response.
             finally:
-                response.close()
-                response.release_conn()
+                if response:
+                    response.close()
+                    response.release_conn()
 
             # Get data of an object from offset and length.
+            response = None
             try:
                 response = client.get_object(
                     "my-bucket", "my-object", offset=512, length=1024,
                 )
                 # Read data from response.
             finally:
-                response.close()
-                response.release_conn()
+                if response:
+                    response.close()
+                    response.release_conn()
 
             # Get data of an SSE-C encrypted object.
+            response = None
             try:
                 response = client.get_object(
                     "my-bucket", "my-object",
                     ssec=SseCustomerKey(b"32byteslongsecretkeymustprovided"),
                 )
                 # Read data from response.
             finally:
-                response.close()
-                response.release_conn()
+                if response:
+                    response.close()
+                    response.release_conn()
         """
         check_bucket_name(bucket_name, s3_check=self._base_url.is_aws_host)
         check_object_name(object_name)