Question

Write a Python program to create a dictionary from a string ‘w3resource’ such that each individual character mates a key and its index value for fist occurrence males the corresponding value in dictionary.

Expected output : {'3': 1, 's': 4, 'r': 2, 'u': 6, 'w': 0, 'c': 8, 'e': 3, 'o': 5}

Answer 1

string = "w3resource"
dictionary = {}
for i in range(len(string)):
    if string[i] not in dictionary:
        dictionary[string[i]] = i
print(dictionary)

Output:

{'w': 0, '3': 1, 'r': 2, 'e': 3, 's': 4, 'o': 5, 'u': 6, 'c': 8}

Explanation:

• The string is "w3resource".
• Each character is used as a key.
• Its first occurrence index is stored as the value.
• If a character appears again, it is not added again because we check if string[i] not in dictionary.