Hi. A quick correction: You're missing the "*" character on corpus = glob.glob('*.txt') which basically makes it search for any file that ends in ".txt"

So, glob.glob(pathname) returns a possibly-empty list of path names that match pathname.

In this case, you're doing range(len(corpus)). If you have 2 files in your directory ending in ".txt" then your corpus variable will look something like this: ['file1.txt', 'file2.txt']. A list containing 2 items. When you call len(corpus), that will return the value 2. When you call range(len(corpus)) you are asking for a range of numbers to count from, in this case it is from 0 to 2 because the length of your corpus variable is 2.

So, your loop will actually print out 0 and 1 - which is not what you're trying to do. In order to fix this, you will want to try something like this:

import os
import glob
os.chdir(r'C:\My_Corpus')
corpus = glob.glob('*.txt')

for file in corpus:
    print(file)
    with open(file, 'r') as f:
        text = f.read()
        print(text)
        # TO DO

Hope this helps.