Answer:
#try except
try:
#opening the file
read_file = open('numbers.txt', 'r')
#Store the numbers in the variable file_numbers.
file_numbers = read_file.read()
#close the file
read_file.close()
#Split the number of files in list_values.
list_values = file_numbers.split()
#how many numbers are there
list_length = len(list_values)
try:
#loop it up
for i in range(list_length):
list_values[i] = float(list_values[i])
#Add up all the numbers, put into list_sum
List_sum = sum(list_values)
#heres how we average it
Average_value = (List_sum)/list_length
#print
print(Average_value)
except ValueError:
print( "File must have only numbers. Try again." )
#handles IOError exceptions
except IOError:
#Display statement
print("Trouble opening file. Try again.")
Explanation:
The python program uses the try-except exception handling method to catch errors in the code. The IOError is used for catching input and output errors in the program like file handling while the ValueError keyword in the except statement is used to catch data type errors from a return statement, calculation or user input.
