如何从 python 的 txt 文件的最后一列中提取数字？

Question

I have a file that looks like this (the last column has more or less space in between the previous one randomly):

Name    LastName    Age
Adrian   Smith      101
Martin   Ville  82
Mary     Morre          9

I want to extract only the ages so I can put them inside a set.

I have tried this so far but I only get random one digit numbers:

age = set()
for line in f:
    for i in line:
        if i.isdigit():
    age.update(i)

Answer 1

You are getting one digit numbers because you only check one digit at a time. For example, when the code reaches the first number, it will first look at "1", then "0" and then "1", and add them each as individual numbers, rather than one number: 101.

It would be easier to split each line into a list of each word in the line, and then add the last word in the list to your set. You could do that with line.split(" ") (which would also leave you with a load of empty strings in the list since there are multiple spaces, but they can be ignored).

age = set()
for idx, line in enumerate(f):
    if idx == 0:  # ignore first line
        continue
    line = line.split(" ")
    number = int(line[-1])
    age.add(number)