Question

Read_file = open('numbers.txt', 'r')

Answer 1

Answer:

To do that, use exception handling

Explanation:

Try:

    read_file = open('numbers.txt', 'r')

    file_numbers = read_file.read()

except  IOError exceptions:

    print("Trouble opening file. Try again")

    read_file.close()

list_values = file_numbers.split()

list_length = len(list_values)

for i in range(list_length):

list_values[i] = float(list_values[i])

except ValueError:

    print("File must have  only numbers. Try again.")

List_sum = sum(list_values)

Average_value = (List_sum)/list_length

print(Average_value)