Change text in file with Python

Question

def false_to_true():
    name = input(\"Input name: \")
    file=open(\"users.txt\",\"r\")
    lines = file.readlines()
    file.close()
    for line in lines:
              


        

Answer 1

You can just use the csv library and forget about string manipulation:

import csv

def false_to_true():
    #read from user.txt file into list(data)
    with open('users.txt', 'r') as userfile:
        data = [row for row in csv.reader(userfile,
                                          delimiter="/",
                                          quoting=csv.QUOTE_NONE)]
    while True:
        #waiting for input until you enter nothing and hit return
        username = input("input name: ")
        if len(username) == 0:
            break
        #look for match in the data list
        for row in data:
            if username in row:
                #change false to true
                row[2] = True
                #assuming each username is uniqe break out this for loop
                break

    #write all the changes back to user.txt
    with open('users.txt', 'w', newline='\n') as userfile:
        dataWriter = csv.writer(userfile,
                                delimiter="/",
                                quoting=csv.QUOTE_NONE)
        for row in data:
            dataWriter.writerow(row)


if __name__ == '__main__':
    false_to_true()