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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Can't delete custom metadata key on object","articleBody":"I ran into some issues trying to delete a custom metadata key from a storage object. I expected the following to work, but did not result in the key being deleted:\r\n\r\n```python\r\n# blob has metadata with key 'foo'\r\nnew_metadata = {}\r\nfor x in blob.metadata:\r\n    if x != 'foo':\r\n        new_metadata[x] = blob.metadata[x]\r\n# new_metadata is now a copy of the metadata without key 'foo'\r\nblob.metadata = new_metadata\r\nblob.patch()\r\n# The blob's metadata still has key 'foo'\r\n```\r\n\r\nThe Rest API indicated to send a value of JSON null associated with the key to perform a deletion,  but that doesn't seem to happen when issuing a blob.patch with a metadata with a key removed.\r\n\r\nAs a work around, I created a copy of the desired metadata, deleted all of the blob's metadata (which does work), then updated the metadata to be the desired metadata.\r\n```python\r\nnew_metadata = {}\r\nfor x in blob.metadata:\r\n    if x != 'foo':\r\n        new_metadata[x] = blob.metadata[x]\r\nblob.metadata = None\r\nblob.patch()\r\nblob.metadata = new_metadata\r\nblob.patch()\r\n```","author":{"url":"https://github.com/hankd-v","@type":"Person","name":"hankd-v"},"datePublished":"2021-02-16T19:49:32.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/381/python-storage/issues/381"}