To update this dict with only one new important and value, You need to use the subscript notation (see Mappings here) that gives for product assignment: The above mentioned will create a new branch referred to as subbranch_of_b1 under the branch branch1 (Take note that branch1 in the above mentioned https://acquisition63950.blog5star.com/33060180/the-ultimate-guide-to-find-new-web-clients