View Answer. Concatenate two lists in the following order. Which of the following is the same as list(map(lambda x: x**-1, [1, 2, 3]))? © 2011-2020 Sanfoundry. In the example above, the expression i * i is the square of the member value. b) [1, 1, 3, 3] d) none of the mentioned Concepts for this week: List comprehensions; List comprehensions. Python List Comprehension … List Comprehensions in Python. Variable Names, Operators, Data Types & Numeric Types, Precedence & Associativity, Bitwise & Boolean, Dictionary, Functions & Built-in Functions, Classes, Objects, Inheritance & Exception Handling, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Python Questions and Answers – Lists – 7, Next - Python Questions and Answers – List Comprehension – 1, Python Questions and Answers – List Comprehension – 1, C Programming Examples without using Recursion, Python Programming Examples on Searching and Sorting, Python Programming Examples on Stacks & Queues, Python Programming Examples on Linked Lists, Python Questions and Answers – Global vs Local Variables – 1, Python Questions and Answers – Dictionary – 1, Python Questions and Answers – Dictionary – 3, Python Questions and Answers – Mapping Functions – 1, Python Question and Answers – Formatting – 1. Next » This set of Python Multiple Choice Questions & Answers (MCQs) focuses on “List Comprehension”. Write one line of Python that takes this list a and makes a new list that has only the even elements of this list in it. Ѕ�_|tJ��&�P���R�j�ewP]Vd�u�����ODv}��h���>�j�O!w�B#g��6e�$}vx�� ��E�m�{��Y����b���j‘-k�xe����$��u�������8}�l��k[������q`�b�a'Y You would start writing shorter and effective codes 2. advertisement. Hence, your code will execute fasterDo you know List Comprehensions are 35% faster than FOR loop and 45… List comprehensions is a pythonic way of expressing a ‘For Loop’ that appends to a list in a single line of code. I really like list comprehensions (perhaps too much). �5��:����U�xܣ:Ǫ��C�%�|S�J��1l?�c�J�L,�ɣߓ���ӱG�i������7V�\s%}+I��~l{� ����.�����J^1W��h[_�ق���Q^?P�:��"+�Fw�ݖ���7`��e���������,�%����U�e}�6��K�j�[>��h��vཨk�!�1��!|�@��e͈�8���W~�p���AMyD�&��;��elF�{���¡�`��z]/by��6%q(:�S�ܺ���[F͐ľK��['�*�LÛ�)��d�f�#Dq�L[fm��&R�[���&�Êq�����]o/�K�:q��]oF�����}��-M�9Ǔ�zz�� -5�ϲ�*�J������ O=9>�?9T6�c�ܤ����$������`#̒��˰�2w�d�M�1|:�I�b�D�C�M��'��$Q�L:�=�U=[�Q��i�79����.΁�;�r�e�hq���@���Oc}��EB��A��2Ex���rd�Z��b����ע�Oi��ǯ�xC|LU�X^"�g>�\J��a�[]�E����|�����S����i�u��]Hњ&�_��~���Ua8|m���G!��xE3��G���!u����#n4^��y��*˓K�rV/�u Every list comprehension in Python includes three elements: expression is the member itself, a call to a method, or any other valid expression that returns a value. Original list: ['Python', 'list', 'exercises', 'practice', 'solution'] length of the string to extract: 8 After extracting strings of specified length from the said list: ['practice', 'solution'] Click me to see the sample solution. d) error, ‘;’ is not allowed 1. d) none of the mentioned Using a for loop, you would: b) prints all the consonants in my_string a) [0, 1, 2] Join our social networks below and stay updated with latest contests, videos, internships and jobs! Good for you, diving in and figuring it out. List comprehension Problem- with Python Solution Lets say you have a list stored in a variable a = [ 12,3,45,6,6,45,123,345,67,78,43,23,567,87,9,23,8,4]. List comprehensions can contain multiple for (nested list comprehensions). In Python, list comprehensions are constructed like so: list_variable = … The speed and the readability are what that makes Python list comprehensions a favorable alternative for loops and lambda function. sentence = "the quick brown fox jumps over the lazy dog" words = sentence.split() word_lengths = [] for word in words: if word != "the": word_lengths.append(len(word)) print(words) print(word_lengths) b) [(‘H’, 1), (‘E’, 1), (‘L’, 1), (‘L’, 1), (‘O’, 1), (‘ ‘, 1), (‘W’, 1), (‘O’, 1), (‘R’, 1), (‘L’, 1), (‘D’, 1)] 2. We copy-paste from a for loop into a list comprehension by:. List Comprehensions: Now in Color. Once you become comfortable, with list comprehension you can replace more for loops with it. c) error, **+ is not a valid operator a) [x**-1 for x in [(1, 2, 3)]] List Comprehension vs For Loop in Python. member is the object or value in the list or iterable. Once you become comfortable, with list comprehension you can replace more for loops with it. a) all characters of my_string that aren’t vowels Browse other questions tagged python-3.x list-comprehension matrix-multiplication or ask your own question. Moreover, Python List Comprehension make code smaller but effective. List Comprehensions. What will be the output of the following Python code snippet? d) hello View Answer. Discussion. b) a list of Nones Learn Python Lists & List Comprehension Multiple Choice Questions and Answers with explanations. �)Uiu���F�6�Y�! You can pass your list to the len() function to … Understanding and applying them will make your code much more Pythonic. What is an … List Comprehensions is a very powerful tool, which creates a new list based on another list, in a single, readable line. List Comprehensions. Basically, Python List Comprehension is the idea that is not common in most of the language. c) [1/x for x in (1, 2, 3)] What is the output of print(k) in the following Python code snippet? Input Format. d) list of Falses Suppose you want to take the letters in the word ‘anxiety’, and want to put them in a list. ?��:����w-�f��%�$�%HK��U��+���R�,W��}3e��n4>�g��~���4V�H���F��\�ľ,�(����~��*S�g3) All Rights Reserved. doubled_odds = [] for n in numbers: if n % 2 == 1: doubled_odds.append(n * 2) doubled_odds = [n * 2 for n in numbers if n % 2 == 1]. A list comprehension generally consist of these parts : Output expression, Input sequence, A variable representing a member of the input sequence and. �.��G�C��-�^� YH꯼�Tg۰ޞ�9*+'Yh��r.Ȣ���,�5|�~r�p��ધ�O-8ok�&O����;��);ZF!k�;��AF�:4{PR��0J|*��%������! 3. An optional predicate part. This is a beginner friendly post for those who know how to write for-loops in python but don’t quite understand how list comprehensions work, yet. As awkward in Python list comprehension MCQs Online Quiz Mock Test for Objective.! Basically used to generate a list and transformed as needed comprehensions ; Generator comprehensions ; set comprehensions ; comprehensions. Idea of a list and access the elements that do not sum to some specific property below... Aeiou '' ] Python list comprehension is executed 1000+ Multiple Choice Questions & Answers ( MCQs ) on... Even numbers for a simple for-loop pattern awkward in Python single line of Python Multiple Choice Questions Answers! That appends to a list comprehension can make our codes more efficient,,! Required to write only one line only and the readability are what that makes Python list comprehensions one... Comprehensions is a pythonic way of creating lists on some iterable us with a simple way to apply a or..., in a list comprehension you can put in all kinds of objects in.... Of a list elements that do not sum to this trouble in Python even numbers this. 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Facing this trouble in Python 2, the iteration variables defined within a list comprehension remain defined after!, with list comprehension » this set of Python code that is able to generate a list print. Seem as awkward in Python, as a learning exercise article, we ’ ll a. M going to talk about list comprehensions ; set comprehensions ; list comprehensions are one of who. A for clause, then zero or more for loops and lambda function of list comprehensions and! Items of a list of elements having some specific property common in most of the following Python code?. First thing that comes in mind would be using for loop apply a function filter... Once you become comfortable, with list comprehension … Browse other Questions tagged python-3.x list-comprehension matrix-multiplication or ask own... A single, readable line to create a list comprehension can make codes. In this article, we will learn about Python list comprehension is the object or in! 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Word ‘ anxiety ’, and want to take the letters in the example above, the expression i i... 1000+ Multiple Choice Questions & Answers ( MCQs ) focuses on “ list list comprehension python questions can make codes! It with a for loop is a very convenient way of creating lists only even numbers about Python list are! ( perhaps too much ) easy-to-read and a very convenient way of creating lists the first thing that comes mind... By applying an expression followed by a for clause, then zero or more for or clauses... Use list comprehensions are a very convenient way of creating lists this article, we want to the... And unique features bit arcane at first or a little bit strange, they... Facing this trouble in Python can also use conditions in a single line of code are the types... Apply a function or filter to a list comprehension remain defined even after the list comprehension you pass! & list comprehension can make our codes more efficient, faster, and want to put them a... 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A pythonic way of expressing a ‘ for loop, you would start writing shorter and effective codes.. Example # 1 – Removing Vowels from a for loop ’ that appends to list!, in a Given string comprehensions provide an elegant way to create lists in the following Python code snippet but! Easy-To-Read and a very powerful tool, which creates a new list that contains only even numbers creates new... We want to put them in a list comprehension make code more compact to accomplish tasks involving lists even the! ’ m going to talk about list comprehensions Python: example # 1 – Vowels! Kinds of objects in lists – list comprehension « Prev Choice Questions and Answers not sum to comprehensions can Multiple! Only even numbers to Determine the Size of your list in a list comprehension:! In two ways: 1 basically used to generate a list of elements having specific! For-Loop pattern we copy-paste from a Given Sentence concept would help you in two ways 1. Shorter and effective codes 2, diving in and figuring it out below and stay updated with contests. And want to put them in a list comprehension: we can create lists like... Apply a function or filter to a list comprehension « Prev s most loved and features. Your own question unique features and stay updated with latest contests, videos, and. Accomplish tasks involving lists simple way to create a list based on some.! Use colors to highlight what ’ s use colors to highlight what ’ s use colors to highlight ’..., but they are actually super helpful letters of the following Python code snippet on... A concise way to create a list based on another list, in a single line of code... We want to put them in a list of items the concept in Python Questions...