Python Interview

In this task, we would like for you to appreciate the usefulness of the groupby() function of itertools . To read more about this function, Check this out .You are given a string . Suppose a character…

collections.deque()A deque is a double-ended queue. It can be used to add or remove elements from both ends.Deques support thread safe, memory efficient appends and pops from either side of the deque…

.remove(x)This operation removes element  from the set.If element  does not exist, it raises a KeyError.The .remove(x) operation returns None.Example>>> s = set([1, 2, 3, 4, 5, 6, 7, 8, 9])>>> s.remove(5)>>> print sset([1, 2, 3, 4,…

You are given  words. Some words may repeat. For each word, output its number of occurrences. The output order should correspond with the input order of appearance of the word. See…

itertools.combinations_with_replacement(iterable, r)This tool returns  length subsequences of elements from the input iterable allowing individual elements to be repeated more than once.Combinations are emitted in lexicographic sorted order. So, if the input iterable…

If we want to add a single element to an existing set, we can use the .add() operation.It adds the element to the set and returns 'None'.Example>>> s = set('HackerRank')>>> s.add('H')>>> print…