Q: How do I delete a specific nickname and password in a text file in python? : I have difficulties on **deleting an account** in a **text file**, although it is a school work.  
Here is my code (long and complicated):  

    create = ""
    import time
    import sys

    while True:
        print("Type create to create, delete to delete")
        acc = input("an account or quit to exit Python: ")
        while acc.lower() == "create":
            found = False
            MinName = 5
            MinPass = 8
            print("Please enter your name.")
            create = input(">").lower()

            if len(create) < MinName:
                print("The name is too short.")
                print("Please enter your name.")
                create = input(">").lower()
            

            # Open a file
            fi = open("E:/New folder/NO/How about no/accounts.txt", "r")    
            #get the data
            data = fi.readlines()   
            # Close opened file
            fi.close()

        
            #check each line in the text file
            for li in data:
                #if the name is already in a file
                if(li.split(":")[0].lower() == create):
                    #print an error of similar username
                    print("Found a similar name, try a different one!")
                    #the name has been found
                    found = True

        
            #if the name wasn't found anywhere in the file
            while found == False:
            #ask the user for the password
                passk = input("Your name is OK, enter pasword:\n>")
                if len(passk) < MinPass:
                    print("Password must be a minimum of 8 letters.")
                    passk = input(">")
                    # Open a file to append to
                    fi = open("E:/New folder/NO/How about no/accounts.txt", "a")    
                    #add the new name/password to the file
                    fi.write("\n" + create + ":" + passk)
                    # Close opened file
                    fi.close()
                    print("Created an account. You may now login.")
                    sys.exit()

        #Deleting an account##########
        while acc.lower() == 'delete':
            MinName = 5
            MinPass = 8
            print("Please enter your name.")
            delete = input(">").lower()

            if len(delete) < MinName:
                print("The name is too short.")
                print("Please enter your name.")
                delete = input(">").lower()

            fi = open("E:/New folder/NO/How about no/accounts.txt", "r")
            data = fi.readlines()
            fi.close()

            #check each line in the text file
            for li in data:
                #if the name is in a file
                if(li.split(":")[0].lower() == delete):
                    #print an text
                    print("Found the name.")
                    #the name has been found
                    found = True
                
                #Password
                    while True:
                        #Set foundpass to false
                        foundpass = False
                        print("Enter your password:")
                        del2 = input(">").lower()

                        if len(del2) < MinPass:
                            print("The password is too short.")
                            print("Please enter your name.")
                            delete = input(">").lower()
                
                        fi = open("E:/New folder/NO/How about no/accounts.txt", "r")
                        data = fi.readlines()
                        fi.close()

                        for li in data:
                            if(li.split(":")[1].lower() == del2):
                                print("Are you sure you want to delete this account?")
                                delok = input("You may lose all your status (for a long time)! Y/N\n>")
                                if delok.lower() == 'y':
                                    file = open("E:/New folder/NO/How about no/accounts.txt", "r")
                                    lines = f.readlines()
                                    f.close()
                                    file = open("E:/New folder/NO/How about no/accounts.txt", "w")
                                    for line in lines:
                                        if line != 
                                        sys.exit()

                                elif delok.lower() == 'n':
                                    print("Your account is not deleted.")
                                    sys.exit()
                    
                            
                        if foundpass == False:
                            print("Incorrect password!")
                        
                        

            #If the name is not in the file
            if found == False:
                print("Incorrect name!")
                delete = input(">").lower()

        if acc.lower() == 'quit':
            break

        else:
            print("This is not an option.")
            time.sleep(1)

The part I need help is:  

    for li in data:
        if(li.split(":")[1].lower() == del2):
            print("Are you sure you want to delete this account?")
            delok = input("You may lose all your status (for a long time)! Y/N\n>")
            **
            if delok.lower() == 'y':
                file = open("E:/New folder/NO/How about no/accounts.txt", "r")
                lines = f.readlines()
                f.close()
                file = open("E:/New folder/NO/How about no/accounts.txt", "w")
                for line in lines:
                    if line !=
                        print("Deleted the account.")
                        sys.exit()
                        **

https://stackoverflow.com/questions/4710067/deleting-a-specific-line-in-a-file-python
This is the website I went on (Deleting a specific line in a file (python)) but it would only do the nickname I realised. The text file is below:  

Name:Password  
aswitneto:llllllll  
madda:mmmmmmmm  

I want to **remove the account in the text file**.  
Any ideas?