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I have two lists, the first of which is guaranteed to contain exactly one more item than the second.I would like to know the most Pythonic way to create a new list whose even-index values come from the first list and whose odd-index values come from the second list.
Get answers to all exercises of Chapter 2: Python Revision Tour II Sumita Arora Computer Science with Python CBSE Class 12 book. Clear your computer doubts instantly & get more marks in computers exam easily. Master the concepts with our detailed explanations & solutions.
- Using The Extend
- Using The * Operator
- Using For Loop
- Using List Comprehension
- Using The itertools.chain
- Which Method to Choose?
Another common method is to use theextend()function, which modifies the original list by adding elements from another list. Explanation: The extend()is an in-place operation that appends each element of list bto list a. This means that the original list a gets updated without creating a new list, which makes it more memory efficient for large lists...
We can use the* operatorto unpack the elements of multiple lists and combine them into a new list. Explanation:The * operatorunpacks the elements of aand b, placing them directly into the new list c.
We can also merge two lists using a simplefor loop. This approach is provides more control if we need to perform additional operations on the elements while merging. Explanation: 1. for item in a: Iterates over each element in list aand appends it to list res. 2. for item in b:Iterates over each element in listband appends it to list res.
List comprehensionis an efficient and concise alternative to the for loopfor merging lists. It allows us to iterate through each list and merge them into a new one in a single line of code. Explanation:List comprehension iterates over both lists aand b, creating a new list by adding all items from each list.
The itertools.chain()method from the itertools module provides an efficient way to merge multiple lists. It doesn’t create a new list but returns an iterator, which saves memory, especially with large lists. Explanation: list(chain(a, b))combines the lists aand b. Thechain(a, b) creates an iterator that collect all items from afirst then all items ...
+ Operator: Quick and simple for small lists but can consume a lot of memory for larger ones.extend() Method:Efficiently merges large lists by modifying the original list in place.Unpacking (*): It provides a clean syntax, however, it may not be optimal for very large lists due to memory usage.itertools.chain(): It works best for large lists. It merges without creating additional memory.Interface Python with MySQL. Get solutions to all chapters of Computer Science with Python by Sumita Arora book Class 12 CBSE & NCERT. Enjoy FREE doubts help & video explanations. This is your guide to ace computers exam easily.
Nov 6, 2023 · Class 12 Computer Science (Python) NCERT Solutions – Free PDF Download. Students can access the list of chapters present in the Class 12 Computer Science Python Books through the below available links. All you have to do is simply tap on the respective chapter and prepare the underlying topics within. Get the most easiest and accurate methods ...
Lists and strings in Python support two-way indexing. Answer. True. Reason — Both lists and strings in Python support two-way indexing, which means we can access elements from the beginning or end of the sequence using positive or negative indices, respectively. Positive indices start from 0 for the first element, while negative indices start ...
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Computer Science, for Class 12, is divided into 13 Chapters, all of which will help you learn something new about the programming world and Python. You will start by learning about Exception handling and File handling in Python. Further, you will learn about -. You will also be learning about the Structured Query Language (SQL) in Class 12 ...
