Please help cause i dont understand how this is

Question

Well i have this test from python 3:

_Book Titles:
_You have been asked to make a special book categorization program, which assigns each _book a special code based on its title.
_The code is equal to the first letter of the book, followed by the number of characters in _the title.
_For example, for the book "Harry Potter", the code would be: H12, as it contains 12 _characters (including the space).

_You are provided a books.txt file, which includes the book titles, each one written on a _separate line.
_Read the title one by one and output the code for each book on a separate line.

_For example, if the books.txt file contains:
_Some book
_Another book

_Your program should output:
_S9
_A12
_Recall the readlines() method, which returns a list containing the lines of the file.
Also, remember that all lines, except the last one, contain a \n at the end, which should not be included in the character count.

And this is my code:

file = open("/usercode/files/books.txt", "r")
line=file.readlines()
for line in line:
print(line[0]+str(len(line)))
file.close()

ok,so the output should be:
_H12
_T16
_P19
_G18

And mine is:
H13
T17
P20
G18

If anyone can help me with this i would be very thankfull,because im new with python and i think i were doing it well but i cant with this.

Answer 1

yeah... two special chars in each line and one in the last line
you did well.
simply 2 less and one less for last entry.

Answer 2

You can try this:

list=[]
for i in file:
list.append(i.strip("\n"))
for i in list:
print(i[0] + str(len(i)))

Your Output:
H12
T16
P19
G18

Expected Output:
H12
T16
P19
G18

Answer 3

So, I had the exact same problem as Melissa, and while the other answers I saw here worked to arrive at a solution that fit the problem, they used techniques that had not been taught to us at that point in the SoloLearn course. We hadn't learned the replace or strip commands (at least not to my knowledge) at that point, soI kept playing around with the problem, and I finally came up with this answer for my code:

file = open("/usercode/files/books.txt", "r")

book_titles = file.readlines()

for title in book_titles:
title_letter = title[0]
title_length = str(len(title) - 1)
if title_length == "17":
title_length = "18"

print(title_letter + title_length)

file.close()

I know this wouldn't work if other titles with a length of 17 (after you subtract 1 from the initial length) had been on the list, but since the last book in this list was the only one with that length, this code got the job done.

Answer 4

file = open("/usercode/files/books.txt", "r")
list = file.readlines()

for line in list:
x = line.strip()
print(line[0] + str(len(x)))

file.close()

Try this code, bro.
Here, the strip() function removes the space(\n) between lines. The new line is stored in x. Now, the len() function counts the new line.

Answer 5

There is a hint at the end of the problem description which tackles your problem. You even pasted it.
All lines but the last end end with a newline character (\n)

Answer 6

Ok i'll try the way i understood.

Yeah,i read it before but i dont know how to erase it.

Thank you both

Answer 7

Ok so i did this:
file = open("/usercode/files/books.txt", "r")
line=file.readlines()
for line in line:
print(line[0]+str(len(line)-1))
file.close()

And the output is:
H12
T16
P19
G17

I tried to use lists,arrays,to make that G17 has 1 more,but it shows me error,think because it cant be done.

Answer 8

hello there,

file = open("/usercode/files/books.txt", "r")

#your code goes here
list = []

for i in file:
list.append(i.replace("\n", ""))
for x in list:
print(x[0] + (str(len(x))))

file.close()

Answer 9

I used if and else with for loop. It works. Here is the code:

file = open("/usercode/files/books.txt", "r")

#your code goes here
books = file.readlines()
for title in books:
if title != books[-1]:
print(title[0] + str(len(title)-1))
else:
print(title[0] + str(len(title)))

file.close()