Take every second row in CSV file, and put it next to the previous row

Question

I have a csv file

1;(same.)
2;Type...
3; (who are you?)
4; I am a talker whom the world has not yet seen. And you?
5; (leave.)
6;Connect to the Internet - I'll leave...
7; (I would like to.)
8;He would like to! And you're a no-brainer guy!

The objective was to make it look like

row1 Question - '(same.)' - answer- 'Type...'
row2 Question - '(who are you?)' - answer- 'I am a talker whom the world has not yet seen. And you?

I am just learning, so it was hard for me.

The feedback is much appreciated, how it can be done easier.

final code

list1=[]
list2=[]
with open('answers.csv',mode='r', newline='') as f:
 reader = csv.reader(f, delimiter=';')
 for line in reader:
 num = int(line[0])
 if num % 2:
 list1.append(line)
 if not num % 2:
 list2.append(line)
# print(list1)
# print(list2)
for i,m in zip(list1,list2):
 print(f'Question {i[1]}, Answer {m[1]}')

• Reinderien: Do you want to write back to a file with the new structure, or just use it to display questions and answers on the terminal?
• Bogdan Mind: Terminal is fine, the objective is mainly to combine every 2 lines.

Answer 1

Since you know it will be every other line and start with a Q, I would use Slicing with step parameter, that way you get every n'th item [::n]. Starting at 1 [1::] for the first list, starting at item 2 [2::] in the second list.

with open('answers.csv',mode='r', newline='') as f:
 reader = csv.reader(f, delimiter=';')
for i, m in zip(reader[1::2], reader[2::2]):
 print(f'Question {i[1]}, Answer {m[1]}')

Hope this helps :)

Answer 2

It's not strictly necessary to build up lists. It is possible to implement a "streamed" version that runs a generator over lines of the open file.

Also, csv is of minimal help here: there are no special text-field delimiters like quotes, and there is only one field you care about - and there are no headers - so you might as well just do the trivial parsing yourself.

Suggested

from typing import Iterator
def parse(filename: str = 'answers.csv') -> Iterator:
 with open(filename, 'r') as f:
 while True:
 line = next(f, None)
 if line is None:
 break
 _, question = line.split(';', 1)
 line = next(f)
 _, answer = line.split(';', 1)
 yield question.rstrip(), answer.rstrip()
for question, answer in parse():
 print('?', question, '\n >', answer)

Output

? (same.) 
 > Type...
? (who are you?) 
 > I am a talker whom the world has not yet seen. And you?
? (leave.) 
 > Connect to the Internet - I'll leave...
? (I would like to.) 
 > He would like to! And you're a no-brainer guy!