If popitem() is used with an empty dictionary what happens?
(a) an empty dictionary is returned
(b) an empty tuple is returned
(c) trace back error is raised
(d) keyerror is raised
Answer:
- The popitem() method is used to remove and return a random key-value pair from a dictionary object in Python.
- The popitem() method takes no arguments and returns a tuple containing the removed key and value. For example, if mydict = {‘a’: 23, ‘b’: ‘78’, ‘d’: 36}, then mydict.popitem() could return (‘b’, ‘78’) or (‘d’, 36) or (‘a’, 23), depending on the random selection. The method also modifies the dictionary object in place, so the removed key-value pair is no longer present in the dictionary.
- However, if the dictionary object is empty, meaning it has no key-value pairs, then the popitem() method cannot remove or return anything. In this case, the method raises a KeyError exception, that indicates that the requested key is not found in the dictionary. For example, if mydict = {}, then mydict.popitem() will raise a KeyError: ‘popitem(): dictionary is empty’ error.
So, the correct answer is (d) keyerror is raised .
