The following recursive function is supposed to return a list that is the reverse of the list it was given. But it has a bug.What is the bug? (Line numbers are not part of the code.)1. def revlist(Ist):2.if len(Ist) == 0:3.return Ist4.else:5.return revlist(lst[1:]) + [Ist[0]O Line 5 should use Ist.append() instead of concatenation.O Line 4 should be elif:, not else:O Line 2 should be: if Ist == []:O The parameter Ist should be list.O The base case should be: if len(Ist)== 0 or len(Ist) == 1:Question 7What is the output of running the following program?def showme(arg):if arg < 10:

Given: Condition in Python Program

The following recursive function is supposed to return a list that is the reverse of the list it was given. But it has a bug What is the bug? (Line numbers are not part of the code.) 1. def revlist(Ist): 2. if len(Ist) == 0: 3. return Ist 4. else: 5. return revlist(Ist[1:]) + [Ist[0]] Line 5 should use Ist.append( instead of concatenation. O Line 4 should be elif:, not else: Line 2 should be: if Ist == []: O The parameter Ist should be list. O The base case should be: if len(Ist) == 0 or len(Ist) == 1:

The following recursive function is supposed to return a list that is the reverse of the list it was given. But it has a bug What is the bug? (Line numbers are not part of the code.) 1. def revlist(Ist): 2. if len(Ist) == 0: 3. return Ist 4. else: 5. return revlist(Ist[1:]) + [Ist[0]] Line 5 should use Ist.append( instead of concatenation. O Line 4 should be elif:, not else: Line 2 should be: if Ist == []: O The parameter Ist should be list. O The base case should be: if len(Ist) == 0 or len(Ist) == 1:

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Q: Given a list of integers, compute recursively (no loops and no list functions) the number of…

A: In this question, we are asked to write a recursive function such that it counts the frequency of…

Q: Complete the following list comprehension Ic5 = [ for c in 'bu be you'] so that it produces the list…

A: lc5 = [ for c in 'bu be you' ] //So that it produces the list [True, True, False, True, False,…

Q: Write a function that takes as input a list of elements and returns a list with elements and their…

A: Note : list index starts from 0.

Q: PYTHON!! In the following code, what line contains the recursive call: def r_sum(nested_num_list):…

A: what is recursion? In programming languages, if a program allows you to call a function inside the…

Q: Complete the following list comprehensionlc5 = [ for c in 'bu be you']so that it produces…

A: Let’s define a python function which outputs True if the alphabet is ‘b’ or ‘u’, because the above…

Q: Write a function that will duplicate every list element using recursion. Example: List: ['I',…

A: Based on Python

Q: need to figure out how to create this function the comments show what it should do and I need to use…

A: def sumEvens(list ,i): if i<0: return 0 elif list[i]%2==0: return…

Q: Assume you have a list of numbers, A, and A[i] (i>=1) represents the ith element of the list. Now…

A: Algorithm step1: intilizes element of list A Step2: take input n step3:-call function f(A,n) step4:…

Q: What command tells cut to output the first five characters of every line from the file practice?

A: In Linux, a file can be created using any of the available text editors or using vi command. To…

Q: PYTHON: create a function code(n) that sorts a list of words alphabetically using a RECURSIVE…

A: Please find the answer below :

Q: Exercis • Derive a recursive Python function to create a list containing the values ranging from 0…

Q: Notice that all of the data in the inner lists are represented as strings. You are to write the…

A: Step 1: Define is_number() function which checks whether the passed value is a number and returns…

Q: Function Description Generate the code for a recursive function: furthest(n: int, lst: list)--> int…

A: I give the code in Python as per your requirement along with output and code screenshot

Concept explainers

Depth First Search

Depth-first search (DFS) also known as Depth First traversal is an algorithm used to traverse or search the nodes in a tree or graph data structure. Traversal usually means visiting all the nodes of a graph. DFS performs in a depth-ward manner. It uses a stack to remember the vertices it has visited. The search starts from the root node, where any arbitrary node is selected as a root node in a graph, and then each node is explored along each branch before performing backtracking. The DFS algorithm uses a recursive technique by following the idea of backtracking. DFS algorithm does this by performing an in-depth search of all the nodes by traversing in a forward direction. If the required node is not found, it starts backtracking to previously visited nodes.

Question

The following recursive function is supposed to return a list that is the reverse of the list it was given. But it has a bug.
What is the bug? (Line numbers are not part of the code.)
1. def revlist(Ist):
2.
if len(Ist) == 0:
3.
return Ist
4.
else:
5.
return revlist(lst[1:]) + [Ist[0]
O Line 5 should use Ist.append() instead of concatenation.
O Line 4 should be elif:, not else:
O Line 2 should be: if Ist == []:
O The parameter Ist should be list.
O The base case should be: if len(Ist)
== 0 or len(Ist) == 1:
Question 7
What is the output of running the following program?
def showme(arg):
if arg < 10:

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

python lab Write a recursive function named reverse that accepts a string argument and returns the original string with its characters reversed. For example, calling reverse ('goodbye') would return 'eybdoog'. The function must use recursion to reverse the characters in the string. Do not use a loop.
Write a recursive function that returns the largest integer in a list. Write a test program that prompts the user to enter a list of integers and displays the largest element.
Write a recursive Python function named initList to create a list containing the values from 0 to n-1. • The function takes two parameters, a reference to the list and an integer which is the value n. In the main program you must: - initialize a list (L = []) - call the recursive function initList with this list L, to modify it - and, ask the user to enter the value n from the keyboard
Construct recursive versions of the library functions that: a. calculate the "sum" of a list of numbers. b. "take" a given number of elements from the beginning of a list. c. select the "last" element of a non-empty list .
How would I write double_str and double_list using only recursion functions?
Quick Sort We choose an element from the list, called the pivot. We'll use it to divide the list into two sub-lists. We reorder all the elements around the pivot The ones with smaller value are placed before it All the elements greater than the pivot after it. After this step, the pivot is in its final position. This is the important partition step. We apply the above steps recursively to both sub-lists on the left and right of the pivot. Quick Sort (Example) Consider the following array Arr[] = {5, 9, 4, 6, 5, 3} Let's suppose we pick 5 as the pivot for simplicity We'll first put all elements less than 5 in the first position of the array: {3, 4, 5, 6, 5, 9} We'll then repeat it for the left sub-array {3,4}, taking 3 as the pivot There are no elements less than 3 We apply quicksort on the sub-array in the right of the pivot, i.e. {4} This sub-array consists of only one sorted element We continue with the right part of the original array, {6, 5, 9} until we get the final ordered…
IN PYTHON THANK YOU
A sequential search of a sorted list can halt when the target is less than a given element in the list. Modify the program to stop when the target becomes less than the current value being compared. In a sorted list, this would indicate that the target is not in the list and searching the remaining values is unnecessary. ----------------------------------------------------------------------------------- """ File: search.py Project 11.1 """ def sequentialSearch(target, lyst): """Returns the position of the target item if found, or -1 otherwise. The lyst is assumed to be sorted in ascending order.""" position = 0 while position < len(lyst): if target == lyst[position]: return position position += 1 return -1 def main(): """Tests with three lists.""" print(sequentialSearch(3, [0, 1, 2, 3, 4])) print(sequentialSearch(3, [0, 1, 2])) # Should stop at second position. print(sequentialSearch(3, [0, 4, 5, 6])) if…
Practice recursion on lists Practice multiple base conditions Combine recursion call with and,or not operators Search for an element in a list using recursion Instructions In this lab, we will write a recursive function for searching a list of integers/strings. Write a recursive function to determine if a list contains an element. Name the function recursive_search(aList, value), where aList is a list and value if primitive type is the object we want to search for. Return a boolean, specifically True if and only if value is an element of aList else return False from the function Examples: recursive_search([1,2,3], 2) == True recursive_search([1,2,3], 4) == False recursive_search([ ], 4) == False recursive_search([ [ 1 ], 2 ], 1) == False # -----> (because the list contains [ 1 ] and 2, not 1) Hint: Think about what the base case is? When is it obvious that the element is not in the list? If we are not at the base case, how can you use the information about the first element of the…