Python Forum - How to write the condition for deleting multiple lines?

Does anyone know how to delete lines in txt file according to user input without using any list or dictionary?

For example content inside txt file:
Question 1 Which is correct?
A. X
B. XX
C. XXX
D. XXXX
Question 2 Which is wrong?
A. X
B. XX
C. XXX
D. XXXX
Question 3 Which is True?
A. X
B. XX
C. XXX
D. XXXX

When user choose to delete question 2, the file will updated and the output will become like this:
Question 1 Which is correct?
A. X
B. XX
C. XXX
D. XXXX
Question 3 Which is True?
A. X
B. XX
C. XXX
D. XXXX

I'm not sure how to write the condition for deleting the A/B/C/D option together with the question entered by user.

Here is my code:

import os
def main():
    
    import os

    answer = input("Enter question to delete:")
    with open("testing.txt", "r") as read:
        with open("temp.txt", "w") as output:
            # iterate all lines from file
            for line in read:
                # if text matches then don't write it
                if line.strip("\n") != answer:
                    output.write(line)
                        
    
    read.close()
    output.close()
    # replace file with original name
    os.replace('temp.txt', 'testing.txt')

main()

(Jul-10-2022, 05:36 AM)Lky Wrote: [ -> ]Does anyone know how to delete lines in txt file according to user input without using any list or dictionary?

For example content inside txt file:
Question 1 Which is correct?
A. X
B. XX
C. XXX
D. XXXX
Question 2 Which is wrong?
A. X
B. XX
C. XXX
D. XXXX
Question 3 Which is True?
A. X
B. XX
C. XXX
D. XXXX

When user choose to delete question 2, the file will updated and the output will become like this:
Question 1 Which is correct?
A. X
B. XX
C. XXX
D. XXXX
Question 3 Which is True?
A. X
B. XX
C. XXX
D. XXXX

I'm not sure how to write the condition for deleting the A/B/C/D option together with the question entered by user.

Here is my code:
import os
def main():
    
    import os

    answer = input("Enter question to delete:")
    with open("testing.txt", "r") as read:
        with open("temp.txt", "w") as output:
            # iterate all lines from file
            for line in read:
                # if text matches then don't write it
                if line.strip("\n") != answer:
                    output.write(line)
                        
    
    read.close()
    output.close()
    # replace file with original name
    os.replace('temp.txt', 'testing.txt')

main()

What are you expecting the user to input ? the number of the question ? or the matching text of the full question they want to remove ?

(Jul-10-2022, 02:25 PM)jcrubaugh45 Wrote: [ -> ]
(Jul-10-2022, 05:36 AM)Lky Wrote: [ -> ]Does anyone know how to delete lines in txt file according to user input without using any list or dictionary?

For example content inside txt file:
Question 1 Which is correct?
A. X
B. XX
C. XXX
D. XXXX
Question 2 Which is wrong?
A. X
B. XX
C. XXX
D. XXXX
Question 3 Which is True?
A. X
B. XX
C. XXX
D. XXXX

When user choose to delete question 2, the file will updated and the output will become like this:
Question 1 Which is correct?
A. X
B. XX
C. XXX
D. XXXX
Question 3 Which is True?
A. X
B. XX
C. XXX
D. XXXX

I'm not sure how to write the condition for deleting the A/B/C/D option together with the question entered by user.

Here is my code:
import os
def main():
    
    import os

    answer = input("Enter question to delete:")
    with open("testing.txt", "r") as read:
        with open("temp.txt", "w") as output:
            # iterate all lines from file
            for line in read:
                # if text matches then don't write it
                if line.strip("\n") != answer:
                    output.write(line)
                        
    
    read.close()
    output.close()
    # replace file with original name
    os.replace('temp.txt', 'testing.txt')

main()
What are you expecting the user to input ? the number of the question ? or the matching text of the full question they want to remove ?

User have to enter full questions

(Jul-10-2022, 02:27 PM)Lky Wrote: [ -> ]
(Jul-10-2022, 02:25 PM)jcrubaugh45 Wrote: [ -> ]What are you expecting the user to input ? the number of the question ? or the matching text of the full question they want to remove ?
User have to enter full questions

import os
def main():
    
    list3=[]
    ans = input("Delete:")
    with open("testing.txt", "r") as read:
        #file_content = read.readlines()
    
        with open("temp.txt", "w") as output:
        # iterate all lines from file
            
            for line in read:
                if line.strip() == ans:  # Or whatever test is needed
                    break
                    # Reads text until the end of the block:
            for line in read:  # This keeps reading the file
                if line[0].isupper():
                    break
                #print(line)
                strip_lines=line.strip()
                list1=strip_lines.split("\n")
                
            
                
                list3.append(list1)
            
            
                
            for line in read:
                currentline = line.strip('\n')
                if line not in list3:
                    output.write(line)
                    
            
    read.close()
    output.close()
    
    os.replace('temp.txt', 'testing.txt')
main()

Here is my latest code. (Assuming the option is in small letter (a./b./c./d.)