How to read the first line from a file as key and the next 3 lines as a list of values to a dictionary, python

Question

I'm trying to read a txt that look like:

Animals
Dog
Cat
Bird
Cities
Paris
London
Chicago

into a dictionary. (The first line into a key followed by three lines of values, and so on) It should be looking something like this:

{"Animals":["Dog","Cat","Bird"],"Cities":["Paris","London","Chicago"]

Please help me!

Answer 1

import itertools

d = {}

with open("C:\path\to\text.txt", "r") as f:
    lines = f.readlines()

    # Separate keys from values
    keys = itertools.islice(lines, 0, None, 4)
    first_values = itertools.islice(lines, 1, None, 4)
    second_values = itertools.islice(lines, 2, None, 4)
    third_values = itertools.islice(lines, 3, None, 4)

    # Set keys and values
    for key in keys:
        key = key.rstrip()
        value1 = first_values.next().rstrip()
        value2 = second_values.next().rstrip()
        value3 = third_values.next().rstrip()

        # Create dict
        l = [value1, value2, value3]
        d[key] = l