Iterating Over Lists RevisitedNow that we know about the range function, we have another way of iterating over a list. Try running the following example. What does it produce?cities = ['Auckland', 'Wellington', 'Christchurch', 'Dunedin']for i in range(len(cities)):city = cities [i]print(i, city)Notes:• The output of this example is very similar to example (a) in the 'Iterating Over Lists' info box. In fact, you could make it behave identically bychanging the final line to print(city) instead of print(i, city).In this example, the for loop iterates over the indexes of the elements of the list, rather than the elements of the list themselves.• It does this by using the range function, which gives us a range of numbers, starting at 0 and going up to (but not including) len(cities). So in theexample, i willI be 0 the first time around the loop, then 1, then 2, and finally 3.• This means that i can be used to index into the list cities in order to extract the element (city) that corresponds to index i.• This means we can print both the city and its index (i) in the final line.This structure is useful when we want to access the indexes of the elements as well as the elements of the list themselves.Write a function print_matching_indexes (items, target) that prints the indexes of all the occurrences of the target in the list items. Check the testcases for how the function should work.Note: Your answer must use a for loop. You are not allowed to use a while loop.For example:TestResultnums = (10, 20, 30]1print_matching_indexes (nums, 20)pets = ['dog', 'cat', 'fish', 'cat', 'dog', 'iguana']1print_matching_indexes (pets, 'cat')empty = []print_matching_indexes (empty, 42)

The range(start, end, interval) function takes three input arguments. The range function returns the…

Write a function print matching_indexes (items, target) that prints the indexes of all the occurrences of the target in the list items. Check the test cases for how the function should work. Note: Your answer must use a for loop. You are not allowed to use a while loop. For example: Test Result nums = [10, 20, 30] print_matching_indexes (nums, 20) 1 pets = ['dog', 'cat', 'fish', 'cat', 'dog', 'iguana'] 1 print_matching_indexes (pets, 'cat') 3 empty = [) print_matching_indexes (empty, 42)

Write a function print matching_indexes (items, target) that prints the indexes of all the occurrences of the target in the list items. Check the test cases for how the function should work. Note: Your answer must use a for loop. You are not allowed to use a while loop. For example: Test Result nums = [10, 20, 30] print_matching_indexes (nums, 20) 1 pets = ['dog', 'cat', 'fish', 'cat', 'dog', 'iguana'] 1 print_matching_indexes (pets, 'cat') 3 empty = [) print_matching_indexes (empty, 42)

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

Similar questions

Instructions Create a program that contains a function append_combine(x, a) where x is a list of integers and a is an integer. Aside from appending a to list x , the function should also check if the number at the end of list before appending a are equal. If they are, then these two values should be combined instead. Combining should be done repeteadly until there are no more consecutive pairs in the list. See example below. Example test cases X = [] append_combine(x, 1) # [1] append_combine(x, 2) # -> [1, 2] append_combine(x, 2) # -> [1, 2, 2] -> [1, 4] append_combine(x, 2) # -> [1, 4, 2] append_combine(x, 2) # -> [1, 4, 2, 2] -> [1, 4, 4] -> [1, 8] append_combine (x, 3) # -> [1, 8, 3] append_combine(x, 2) # -> [1, 8, 3, 2] append_combine(x, 4) # -> [1, 8, 3, 2, 4] append_combine(x, 4) # -> [1, 8, 3, 2, 4, 4] -> [1, 8, 3, 2, 8] # Final value of x is [1, 8, 3, 2, 8]
have been given a singly linked list of integers. Write a function that returns the index/position of integer data denoted by 'N' (if it exists). Return -1 otherwise. Note :Assume that the Indexing for the singly linked list always starts from 0.Input format :The first line contains an Integer 'T' which denotes the number of test cases. The first line of each test case or query contains the elements of the singly linked list separated by a single space. The second line contains the integer value 'N'. It denotes the data to be searched in the given singly linked list. Remember/Consider :While specifying the list elements for input, -1 indicates the end of the singly linked list and hence -1 would never be a list element. Output format :For each test case, return the index/position of 'N' in the singly linked list. Return -1, otherwise. Output for every test case will be printed in a separate line. Note:You do not need to print anything; it has already been taken care of. Just implement…
Please follow all the steps given
The mapped list pattern Our second pattern is the mapped list pattern, described in video 4 3 mapped list pattern. Often we need to write a function that takes a list as a parameter and returns a new list in which each item in the original list is "mapped" to a new item in the result list. For example, the following function takes a list of numbers as a parameter and returns a list of all the numbers squared, e.g. squares ( [1, 3, 7]) returns [1, 9, 49]. def squares (nums): "Returns the squares of the given numbers""" result = [] for num in nums: result.append (num * num) return result Although this is just a special case of the accumulator pattern, it is so common that we give it its own name: the mapped list pattern. Consider the following function: def squares(nums): ""Returns the squares of the given numbers""" result = [] for num in nums: result.append (num * num) return result If the main program calls print(squares ( [5, -3, 2, 7]) what is the state table for the function…
please use python
Task 01 Write a function that takes a dictionary as a parameter. The dictionary holds student names as keys and their mid-term marks in the python course as values. Your function should get the student name corresponding to the minimum and maximum mark achieved by the student and return it to the function call. Then, finally prints the returned statement after the function call. Sample Input: {'Samin': 25, 'Lily': 28,'Akib': 17,'Salma': 22, 'Imon': 20 } Function Call: function_name({'Samin': 25, 'Lily': 28,'Akib': 17,'Salma': 22, 'Imon': 20 }) Sample Output: Highest scorer: Lily Lowest scorer: Akib Sample Input: {"A":60,"B":30,"P":2, "R":8, "S":33, "T":88} Function Call: function_name({"A":60,"B":30,"P":2, "R":8, "S":33, "T":88}) Sample Output: Highest scorer: T Lowest scorer: P
Create a list L containing at least 10 values ranging from j to k. Using a for loop, code a function that will compute and display the following list: L_out[0] = L[0] L_out[i] = L[i] + L[i-1] if i is odd and i is not equal to 0 L_out[i] = L[i] * 3 if i is even and i is not equal to 0 where L[i] represents the value stored in L at the position i. Example: L ‘(2 3 4 5) L_out ‘(2 5 12 9)
JS Write a function named sum_between_indices whose parameter is a list/array of decimal numbers. Your function must return the sum of the entries at index 4 through index 15. Make certain to include the entries at index 4 and at index 15 in your sum. You SHOULD assume the parameter will have more than 15 entries.
This is for r Regarding a for loop, which of the following is not true? The for keyword must be followed by parentheses. Following the for statement, the code to be executed is recognized by it being indented. The number of times the loop will be performed is determined by the length of the vector passed to the for keyword. The for loop can contain other for loops.
solution in python language
code in python The function print_reverse takes one parameter, L, which is a list. The function then prints the items in the list in reverse order, one item per line, WITHOUT changing the value of L. Write the function definition. Note 1: This function does NOT get anything from standard input. Note 2: This function DOES, however, print to standard output. Note 3: You should NOT return anything from this function (let it return None by default). Hint: Some ideas for iterating over a list in reverse order are given here. For example: Test Result L = ['apple', 'banana', 'cherry'] Lcopy = L[:] return_value = print_reverse(L) if return_value != None or L != Lcopy: print("Error") cherry banana apple L = ['happy'] Lcopy = L[:] return_value = print_reverse(L) if return_value != None or L != Lcopy: print("Error") happy L = [] Lcopy = L[:] return_value = print_reverse(L) if return_value != None or L != Lcopy: print("Error")
please code in python Assume you own a small cafeteria with very limited menu and you want to automate the orders. You have a list of menu items, a list with the price of these items. The number of elements in both lists should be the same. The program then asks the customer how many elements he wants from each item, then it should summarize the order of the customer and announce the price to pay. You can use the function from the previous exercise to check that the user enters a non-negative quantity each time.Assuming that we have:MENU_ITEMS=['karak','tea','coffee']PRICE_LIST=[2,1,5]You should get a sample run similar to that:How many karak do you want? 3How many tea do you want? 2.5Please enter valid quantity.How many tea do you want? -2Please enter valid quantity.How many tea do you want? 0How many coffee do you want? 1Your order is: - 3 karak - 0 tea - 1 coffeeYour total bill is 11 QAR.