IndexError: list index out of range

[Amychan-air]

I am a novice. I don't know what i did wrong.
when i run main.py, IndexError: list index out of range
it is main.py:
data = open('data.txt', 'r')
row = -1
while True:
row = row + 1
word = data.readlines()[row]
print(html_p.find(word))

data.txt:
tommy
amy
bobby
Change
next

[iamkaushal]

Hi @Amychan-air you are increasing the value of the row in an infinite loop. Hence it is getting out of range once the rows in the files reach the end.

[Amychan-air]

I have found another solution.But I want to know why this error occurs.
it is my new python:
data = open('data.txt', 'r')
row = -1
while True:
if row <= 15:
row = row + 1
word = data.readlines()[row]
print(word)
else:
break

So it won't go out of range,but also err.

Below I will show examples of my success, and I don't want to dwell on it anymore.
data = open('data.txt', 'r')
for word in data:
word = word.replace('\n', '')
loccat = html_p.find(word)