code: def _exists_with_etag(self, name, content):
          
          url = self._get_url(name)
          response = requests.head(url)
          if response.status_code == 404:
              return False
          etag = response.headers['ETAG'].split('"')[1]
          hash = self.file_hash(name, content)
          return etag.startswith(hash)
docs: Checks whether a file with a name and a content is already uploaded to Cloudinary.
          Uses ETAG header and MD5 hash for the content comparison.