How to add a key to every object inside a list.

[rizwan29]

Eg. Input:

[ { "classA":"A1", "classB":"B1" }, { "classA":"A2", "classB":"B2" }, { "classA":"A3", "classB":"B3" } ]

Now I want to add a key classC to every object of the list and, the values for this key are coming from another variable.
Eg. values = ["C1", "C2", "C3"]

Output:
[ { "classA":"A1", "classB":"B1", "classC":"C1" }, { "classA":"A2", "classB":"B2", "classC":"C2" }, { "classA":"A3", "classB":"B3", "classC":"C3" } ]

[kurtbrose]

here's one way you could do it

glom( (object_list, c_list), (Invoke(zip).star(T), Assign(T[0]['classC'], T[1]), T[0]) )

[kurtbrose]

hmm this turned out to be embarrassingly complicated

>>> glom( (obj_list, c_list), (Invoke(zip).star(T), [(Assign(T[0]['classC'], Spec(T[1])), T[0])]) )
[{'classA': 'A1', 'classB': 'B1', 'classC': 'C1'}, {'classA': 'A2', 'classB': 'B2', 'classC': 'C2'}, 
{'classA': 'A3', 'classB': 'B3', 'classC': 'C3'}]

[kurtbrose]

(Invoke(zip).star(T), [(Assign(T[0]['classC'], T[1]), T[0])])

what can we do to clean this up?

• Zip in reduction.py
• Assign val eval Spec or T, not just Spec

(Zip(), [(Assign(T[0]['classC'], T[1]), T[0])])

[kurtbrose]

another approach...

(Invoke(zip).star(T), [(Let(class_c=T[1], T[0], Assign('classC', S['class_c'])])

[kurtbrose]

maybe another approach -- don't mutate the old but just move forward

also doesn't mutate the old

>>> glom( (obj_list, c_list), (Invoke(zip).star(T), [Invoke(dict).specs(T[0], classC=T[1])]) )
[{'classA': 'A1', 'classB': 'B1', 'classC': 'C1'}, {'classA': 'A2', 'classB': 'B2', 'classC': 'C2'}, 
{'classA': 'A3', 'classB': 'B3', 'classC': 'C3'}]