Please someone help me with this python code. Am finding it difficult to understand. Thanks

Question

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Create a Python dictionary that returns a list of values for each key. The key can be whatever type you want.

Design the dictionary so that it could be useful for something meaningful to you. Create at least three different items in it. Invent the dictionary yourself. Do not copy the design or items from some other source.

Next consider the invert_dict function from Section 11.5 of your textbook.

# From Section 11.5 of:
# Downey, A. (2015). Think Python: How to think like a computer scientist. Needham, Massachusetts: Green Tree Press.

def invert_dict(d):
inverse = dict()
for key in d:
val = d[key]
if val not in inverse:
inverse[val] = [key]
else:
inverse[val].append(key)
return inverse

Modify this function so that it can invert your dictionary. In particular, the function will need to turn each of the list items into separate keys in the inverted dictionary.

Answer 1

Eashan Morajkar

mmhh...

rather than 'join' I would say 'store together':
same initial values (wich becomes keys) could occur only once, so must be able to store multiple values (wich was initial keys)...

however, don't post answer: OP must do it by himself ;P

Answer 2

good exercise ^^

where is your attempt?
where are you stuck?

Answer 3

I did not understand it correctly
if input is {'1':1,'2':2,'3':3}
Then should output be {'3':3,'2':2,'1':1}

Answer 4

Eashan Morajkar

if input is: { 'a': 1, 'b': 2, 'c': 1 }
then output: { '1': ['a', 'c'], '2': ['b'] }

Answer 5

visph so the code has to invert the keys with values and as there cant be similar keys the join has to join the values

Answer 6

visph He got the answer he had messaged me

Answer 7

Thanks everyone for your help 😊😊