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Python Exercise: Create a dictionary from two lists without losing duplicate values

Python dictionary: Exercise-36 with Solution

Write a Python program to create a dictionary from two lists without losing duplicate values.

Sample Solution:-

Python Code:

from collections import defaultdict
class_list = ['Class-V', 'Class-VI', 'Class-VII', 'Class-VIII']
id_list = [1, 2, 2, 3]
temp = defaultdict(set)
for c, i in zip(class_list, id_list):
    temp[c].add(i)
print(temp)

Sample Output: 

defaultdict(<class 'set'>, {'Class-VII': {2}, 'Class-VI': {2}, 'Class-V': {1}, 'Class-VIII': {3}})

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Python: Tips of the Day

Python: Convert byte to a string?

You need to decode the bytes object to produce a string:

>>> b"abcde"
b'abcde'

# utf-8 is used here because it is a very common encoding, but you
# need to use the encoding your data is actually in.
>>> b"abcde".decode("utf-8") 
'abcde'

Ref: https://bit.ly/2YuvClI