Author: Anonymous

To calculate the average of the numeric values in a list, the first step is to get the total of values in the list.

What values will list2 contain after the following code executes?      list1 = [1, 2, 3]      list2 = [item + 1 for item in list1]

Which of the following is the correct way to open a file named users.txt in ‘r’ mode?

This function in the random module returns multiple, nonduplicated random elements from a list.

What will be the output after the following code is executed? import matplotlib.pyplot as plt def main():     x_crd = [0, 1 , 2, 3, 4, 5]     y_crd = [2, 4, 5, 2]     plt.plot(x_crd, y_crd)   if __name__ == ‘__main__’:     main()

What will be the output after the following code is executed and the user enters 75 and -5 at the first two prompts? def main():     try:         total = int(input(“Enter total cost of items? “))         num_items = int(input(“Number of items “))         average = total / num_items     except ZeroDivisionError:         print(‘ERROR: cannot have 0 items’)     except ValueError:         print(‘ERROR: number of items cannot be negative’)   if __name__ == ‘__main__’:     main()

In the following sequence, each number (except the first two) is the sum of the previous two numbers: 0, 1, 1, 2, 3, 5, 8, 13, …. This sequence is known as the Fibonacci sequence. We speak of the i’th element of the sequence (starting at 0)– thus the 0th element is 0, the 1st element is 1, the 2nd element is 1, the 3rd element is 2 and so on. Given the positive integer n, associate the nth value of the fibonacci sequence with the variable result. For example, if n is associated with the value 8 then result would be associated with 21.

A(n) __________ access file is also known as a direct access file.

Which method will return an empty string when it has attempted to read beyond the end of a file?

What will be the value of the variable list2 after the following code executes? list1 = [1, 2, 3] list2 = [] for element in list1:     list2.append(element) list1 = [4, 5, 6]