Starting with creating our data file data.txt:
12
54
7
332
54
1
0
As before we start with defining a variable count to start at zero. We increase it by 1 each time around the loop and print it out at the end:
total = 0
count = 0
with open("data.txt") as f:
for line in f:
number = int(line)
total += number
count += 1
print("Sum of all", count, "values is:", total)
python file.py