10.9 LAB: Exceptions with lists

Question

Given a list of 10 names, complete the program that outputs the name specified by the list index entered by the user. Use a try block to output the name and an except block to catch any IndexError. Output the message from the exception object if an IndexError is caught. Output the first element in the list if the invalid index is negative or the last element if the invalid index is positive.

Note: Python allows using a negative index to access a list, as long as the magnitude of the index is smaller than the size of the list.

Ex: If the input of the program is:

5

the program outputs:

Name: Jane

Answer 1

"""

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Solution by: Brian Zou

"""

# example list of names

name_list = ["Holly", "Aaron", "Lora", "Bill", "Dane",

"Jane", "Jack", "Yanice", "Ron", "Veronica"]

# take an index via user input as an integer

name_index = int(input("Enter an index: "))

try: # we try to get the name if it is valid

print(name_list[name_index])

except IndexError as error: # if we catch an error, then print the error

print(error.args)

if name_index < 0: # print first element when error index is negative

print(name_list[0])

elif name_index > 0: # print last element when error index is positive

print(name_list[-1]) # -1 gets the last element