Starting with creating our data file data.txt:

data.txt

12
54
7
332
54
1
0

The logic in this script is identical but instead of having total, count and mean as separate variables, we have collected them into a single dictionary:

file.py

stats = {"sum": 0, "count": 0}

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

if stats["count"] > 0:
    stats["mean"] = stats["sum"] / stats["count"]

print(stats)

python file.py

file.py

stats = {"sum": 0, "count": 0}

with open("../data/data.txt") as f:
    for line in f:
        number = int(line)
        stats["sum"] += number
        stats["count"] += 1

if stats["count"] > 0:
    stats["mean"] = stats["sum"] / stats["count"]

print(stats)