Why len() function counts \n in a word?

Question

Hello, in one of the tasks I need to index some books with the first letter and number of symbols in name of the books. Example: “Harry Potter\n” -> H12. So I don’t understand why len() function counts \n as symbol?
My code:
file = open("/usercode/files/books.txt", "r")
lines = file.readlines()
n = 0
try:
for line in lines:
first_line = str(lines[n])
first_word = first_line[0]
index = str(len(first_line))
print(first_word[0]+index)
n += 1
finally:
file.close()

Answer 1

Because '\n' also a character.

Answer 2

But it is just an intendation, isn’t it?

Answer 3

No. It is part of word. You can see in 'Harry Potter\n'.

Just remove '\n' from first_line before.
Use replace function...

Answer 4

Thank you a lot