iterating over file object in Python does not work, but readlines() does but is inefficient

Question

In the following code, if I use:

for line in fin:

It only executes for \'a\'

But if I use:

wordlist = fin.readline         


        

Answer 1

Try:

from collections import defaultdict
from itertools import product

def avoids():
    alphabet = 'abcdefghijklmnopqrstuvwxyz'

    num_words = defaultdict(int)

    with open('words.txt') as fin:
        words = [x.strip() for x in fin.readlines() if x.strip()]

    for ch, word in product(alphabet, words):
        if ch not in word:
             continue
        num_words[ch] += 1

    return num_words