Computer Science
If my_dict is a dictionary as defined below, then which of the following statements will raise an exception ?
my_dict = {'apple' : 10, 'banana' : 20, 'orange' : 30}
- my_dict.get('orange')
- print(my_dict['apple', 'banana'])
- my_dict['apple'] = 20
- print(str(my_dict))
Answer
print(my_dict['apple', 'banana'])
Reason — In Python dictionaries, keys must be accessed individually or as a single key. The expression my_dict['apple', 'banana'] attempts to use a tuple as a key (i.e., ('apple', 'banana')), which does not exist in my_dict. As a result, this will raise an Error. The other statements will not raise exceptions; my_dict.get('orange') will return 30, my_dict['apple'] = 20 will update the value for the key 'apple', and print(str(my_dict)) will print the dictionary as a string.
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