I’ve been stuck on this question for quite sometime and just can’t figure it out. I just want to be able to understand what I’m missing and why it’s needed. What I need to do is make a function which adds each given key/value pair to the dictionary. The argument key_value_pairs will be a list of tuples in the form (key, value).
def add_to_dict(d, key_value_pairs): newinputs = [] #creates new list for key, value in key_value_pairs: d[key] = value #updates element of key with value if key in key_value_pairs: newinputs.append((d[key], value)) #adds d[key and value to list return newinputs
I can’t figure out how to update the “value” variable when d and key_value_pairs have different keys.
The first three of these scenarios work but the rest fail
>>> d = {} >>> add_to_dict(d, []) [] >>> d {} >>> d = {} >>> add_to_dict(d, [('a', 2]) [] >>> d {'a': 2} >>> d = {'b': 4} >>> add_to_dict(d, [('a', 2)]) [] >>> d {'a':2, 'b':4} >>> d = {'a': 0} >>> add_to_dict(d, [('a', 2)]) [('a', 0)] >>> d {'a':2} >>> d = {'a', 0, 'b': 1} >>> add_to_dict(d, [('a', 2), ('b': 4)]) [('a', 2), ('b': 1)] >>> d {'a': 2, 'b': 4} >>> d = {'a': 0} >>> add_to_dict(d, [('a', 1), ('a': 2)]) [('a', 0), ('a':1)] >>> d {'a': 2}
Thanks
Edited.