Filling a dictionary with lists not works in python

Question

Simply, I am trying to fill up the dictionary from two lists, the first list has treated as the keys where all have the same word "text". And the second list has treated as values.

List_1 = ["text", "text", "text"]

List_2 = ["Programmer", "Engineer", "Art Therapist"]

data_dict = {}
for j in range(len(List_1)):
    data_dict[List_1[j]] = List_2 [j]

print(data_dict)


#Expected output:
{'text': 'Programmer', 'text': 'Engineer', 'text': 'Art Therapist'}

#What I am getting is only:
{'text': 'Art Therapist'}

Why overwriting is happening? Can anyone help with this?

Oh, really? So, How I can achieve this scenario? {'text': 'Programmer', 'text': 'Engineer', 'text': 'Art Therapist'} — Mohsen Ali, Jan 16 '20 at 09:34
@MohsenAli just think what would calling `my_dict['text']` return in that situation? You need to think about how dictionaries work, hashing keys etc. — Chris_Rands, Jan 16 '20 at 09:35
`zip(List_1, List_2)` will give you `[('text', 'Programmer'), ('text': 'Engineer'), ('text', 'Art Therapist')]` — AlexisBRENON, Jan 16 '20 at 09:35
@ AlexisBRENON, Your way is possible for me and helpful. Thanks — Mohsen Ali, Jan 16 '20 at 09:36
you can have `{'text':['Programmer','Engineer','Art Therapist']}` basically the value is a list. — Boendal, Jan 16 '20 at 09:36
You can use [pandas.DataFrame](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.html) as alternate. — Dishin H Goyani, Jan 16 '20 at 09:37

norok2 · Accepted Answer · 2020-01-16T09:52:30.390

You are using the wrong data structure for what you want to achieve, since dict keys must be unique.

You could either zip() the two lists together (but this will still be a sequence / list):

list(zip(List_1, List_2))
# [('text', 'Programmer'), ('text', 'Engineer'), ('text', 'Art Therapist')]

or create a custom class implementing the functionalities you were expecting from the dict(). See Make a dictionary with duplicate keys in Python for more info.

Filling a dictionary with lists not works in python

1 Answers1