Adding strings from python to text file and then verify lines in while loop - python-3.7

Question

I'm new to coding and still learning about Python.
I have a task where I have to upload lines from Python to a text file and then verify the lines later in the code e.g. I have to input user names and user passwords and add to the text file as [user_name, user_pass].
My problem is that when I try to verify the line one of 2 things happen. After I added a split function for the line e.g. verified_user, verified_password = line.split(", ") it runs into an error stating that I do not have enough values for the request made e.g 2 expected, 1 made. If I change the split input and it does run, the verification loop states that my inputs does not match any lines in the string.
Every thing works if I add the information to the text file only. But the moment I add via the appendix action in Python it no longer works.
this is what I have so far:
user_list = []
all_names_entered = "no"
while all_names_entered == "no":
user_name = input("Enter user name: ")
user_pass = input("Enter password: ")
user_list.append(user_name + ", " + user_pass)
while True:
all_names_entered = input("All users entered?: ")
if all_names_entered in ['yes','no']:
break
else:
print( 'please answer with yes or no' )
for items in user_list:
with open('user.txt', 'a') as file:
file.write(f"{user_name}, {user_pass}\n")
print (user_list)
file.close()
the next block reads as follow:
user_file = open("user.txt", "r+")
login = False
while login == False:
username = input("Enter user name: ")
password = input("Enter user password: ")
for line in user_file:
other = line.strip()
valid_user, valid_password = line.split(", ")
if username == valid_user and password == valid_password:
login = True
print ("You have successfully logged in")
break
else:
print("You have entered incorrect detail. Please try again")
user_file.seek(0)
user_file.close()

Answer 1

Firstly, indentation is important in Python.
Secondly, you're supposed to loop if user enters 'no'.
Utilize the item that's initialized in each for loop.
You initialized other but it was never consumed.
Following is code for writing into file:
user_list = []
all_names_entered = "no"
while all_names_entered == "no":
user_name = input("Enter user name: ")
user_pass = input("Enter password: ")
user_list.append(user_name + ", " + user_pass)
query_all_names_entered = True
while query_all_names_entered:
all_names_entered = input("All users entered?: ")
if all_names_entered == 'yes':
query_all_names_entered = False
break
elif all_names_entered == 'no':
query_all_names_entered = False
continue
else:
print('Please answer with yes or no')
all_names_entered = "no"
with open('user.txt', 'a') as file:
for item in user_list:
file.write(f"{item}\n")
print (user_list)
file.close()
And following is for reading file to log in:
user_file = open("user.txt", "r+")
login = False
lines = user_file.readlines()
while login == False:
username = input("Enter user name: ")
password = input("Enter user password: ")
for line in lines:
valid_user, valid_password = line.strip().split(", ")
if username == valid_user and password == valid_password:
login = True
print ("You have successfully logged in")
break
if login == False: print ("You have entered incorrect detail. Please try again")
user_file.close()