Beginning Python

Starting with creating our data file data.txt:

data.txt
12
54
7
332
54
1
0

Here the loop itself has not changed, we've just created a new variable afterwards, mean which is calculated from total and count:

file.py
total = 0
count = 0

with open("data.txt") as f:
    for line in f:
        number = int(line)
        total += number
        count += 1

mean = total / count

print("Sum of all", count, "values is:", total)
print("The mean is", mean)
$
python file.py

Sum of all 7 values is: 460
The mean is 65.71428571428571