Finding minimum, maximum and range of character count in every line of a TXT file

Question

I have a text file and I need to count the number of characters per line and then print the minimum, maximum value and range. Example (txt file):

lzaNDDRipfohkALungYAipuOhbWIpkmsSqvXkjRYNxCADTUKzS
aQLi
DwhhJfvUd

The output should be:

• Min: 4 characters
• Max: 50 characters
• Range: 46 characters

and NULL if the file is empty.

Answer 1

You can use the built-in min() and max() methods, using the built-in len() method as the keys:

with open("file.txt", "r") as f:
    lines = f.read().splitlines()

mi = len(min(lines, key=len))
ma = len(max(lines, key=len))
ra = ma - mi

print(f"Min: {mi} Max: {ma} Range: {ra}")

Output:

Min: 4 Max: 50 Range: 46