Reading files and averaging the contents in Python

I am reading three different files and printing the output. However, I also want to print the average of each line from the three files. I present the current and expected outputs.

N = [1, 2, 3]
for i in N:
    filepath = r"C:\Users\USER\OneDrive - Technion\Research_Technion\Python_PNM\Surfactant A-D\Trials\{}\len_J.py".format(i)
    try:
        with open(filepath, "r") as f:
            content = f.read()
            print(content)
    except FileNotFoundError:
        print("File not found:", filepath)

The current output is

1
2
3
4
5
6
7
8
9

The expected output is

4 #(1+4+7)/3
5 #(2+5+8)/3
6 #(3+6+9)/3

read() returns either a string or bytes. You're currently getting a string. You need to parse the integers on each line, save them in a list or numpy array and then you can call np.average to get the value you need.

You have 3 files. Each file has a number of lines. Each line contains a single integer value

Therefore (using different file paths):

NFILES = 3
values = [[] for _ in range(NFILES)]
for i in range(NFILES):
    with open(f'/Volumes/G-Drive/File{i+1}.txt') as data:
        values[i] += map(int, filter(lambda x: x.strip().isdecimal(), data))
for t in zip(*values):
    print(sum(t)//len(t))

Output:

4
5
6

Note:

If any lines in any of the files contains something that cannot be converted to int then such lines will be ignored

Here's some sample code for that:

contents = "1\n2\n3"
num_array = contents.split("\n")
total = 0
for number in num_array:
    total += int(number)
print(total / len(num_array))

contents is the content you read from your files. You'll have to watch out if not every line in the file is a number because then the integer conversion will throw an exception.

Also I assume that the numers in the file are separated by newlines, if now you'll have to replace the character in the split statement.