Python Interview

collections.OrderedDictAn OrderedDict is a dictionary that remembers the order of the keys that were inserted first. If a new entry overwrites an existing entry, the original insertion position is left unchanged.ExampleCode>>> from…

There is an array of  integers. There are also  disjoint sets,  and , each containing  integers. You like all the integers in set  and dislike all the integers in set . Your initial happiness is . For each  integer…

  is a right triangle,  at .Therefore, .Point  is the midpoint of hypotenuse .You are given the lengths  and .Your task is to find  (angle , as shown in the figure) in degrees.Input FormatThe first line contains the length of…

When users post an update on social media,such as a URL, image, status update etc., other users in their network are able to view this new post on their news…

 collections.namedtuple()Basically, namedtuples are easy to create, lightweight object types.They turn tuples into convenient containers for simple tasks.With namedtuples, you don’t have to use integer indices for accessing members of a tuple.ExampleCode 01>>> from…

ExceptionsErrors detected during execution are called exceptions.Examples:ZeroDivisionErrorThis error is raised when the second argument of a division or modulo operation is zero.>>> a = '1'>>> b = '0'>>> print int(a) /…

 The defaultdict tool is a container in the collections class of Python. It's similar to the usual dictionary (dict) container, but the only difference is that a defaultdict will have a default value if…

A set is an unordered collection of elements without duplicate entries.When printed, iterated or converted into a sequence, its elements will appear in an arbitrary order.Example>>> print set()set([])>>> print set('HackerRank')set(['a', 'c', 'e',…

Polar coordinates are an alternative way of representing Cartesian coordinates or Complex Numbers.A complex number  is completely determined by its real part  and imaginary part .Here,  is the imaginary unit.A polar coordinate () is completely determined by modulus  and…

itertools.permutations(iterable[, r])This tool returns successive  length permutations of elements in an iterable.If  is not specified or is None, then  defaults to the length of the iterable, and all possible full length permutations are generated.Permutations…