writing looped function(s) output to a text file-CodePudding

Okay, so up to the file creation/writing the code works as expected. I'm trying to figure out how to write the output to a text file and have it saved so I can add a list of users by just adding their names.

def login():
    while True:
        first_name = input("Enter your first name: ")
        if first_name.lower() == "done":
            print("Done!")
            break
        last_name = input("Enter your last name: ")
        Username = str(first_name[0])   str(last_name)
        Password = str(first_name[0])   str(last_name)   str('1!')
        print("Username: ", Username.upper())
        print("Password: ", Password.upper())
        print("\n")
login()

with open('test.txt', 'w') as f:
    for lines in login():
        f.writelines(lines)

I just turned it into the function "login" as to my knowledge I needed a way to tell the file what to write.

The output of the first 13 lines (enter first & last name, print username & password) looks like this...

" Enter your first name: Tony Enter your last name: Stark Username: TSTARK Password: TSTARK1!

Enter your first name: john Enter your last name: wayne Username: JWAYNE Password: JWAYNE1!

Enter your first name: done Done! Enter your first name: "

As to what is preferred to be written in the file:

" Username: TSTARK Password: TSTARK1!

Username: JWAYNE Password: JWAYNE1!

would be ideal to have it in a similar format with a \n to separate each user's information for ease of access

In terms of what I've tried to resolve myself. I'm not too familiar with file writing code I did use https://www.pythontutorial.net/python-basics/python-write-text-file/ as a resource. I tried creating the file on my desktop to see if that might have been the issue, I was writing to a non-existent file. I believe it will require the writelines method as I'm attempting to essentially write 2 lines as 1 entry and then add a blank line and start the second entry.

I know it's attempting to open a text file named test.txt with the permission to write. I assume line 16

for lines in login():

is where it should be grabbing the username & password from the function "login" and then directed to write multiple lines

CodePudding user response：

try this.

def login():
    lst = []
    while True:
        first_name = input("Enter your first name: ")
        if first_name.lower() == "done":
            print("Done!")
            break
        last_name = input("Enter your last name: ")
        Username = str(first_name[0])   str(last_name)
        Password = str(first_name[0])   str(last_name)   str('1!')
        print("Username: ", Username.upper())
        print("Password: ", Password.upper())
        print("\n")
        lst.append(f"Username: {Username.upper()} Password: {Password.upper()}\n") # append value to lst
    return lst
        
# --------------------------------------------------------------- #
with open('test.txt', 'a') as f:
    f.writelines(login())  # write return lst to file mode is `a` for append 

#   OR   #

return_lst = login()
with open('test.txt', 'a') as f:
    f.writelines(return_lst)  # write return lst to file mode is `a` for append

THis one after OP want(discussion in a private chat group)

def login():
    while True:
        with open('test.txt','a') as f:
            first_name = input("Enter your first name: ")
            if first_name.lower() == "done":
                print("Done!")
                break
            last_name = input("Enter your last name: ")
            Username = str(first_name[0])   str(last_name)
            Password = str(first_name[0])   str(last_name)   str('1!')
            print("Username: ", Username.upper())
            print("Password: ", Password.upper())
            print("\n")
            f.write(f"Username: {Username.upper()} Password: {Password.upper()}\n")

login()

CodePudding user response：

You could print with file input

with open('test.txt', 'w') as f:
    def login():
        while True:
            first_name = input("Enter your first name: ")
            if first_name.lower() == "done":
                print("Done!", file=f)
                break
            last_name = input("Enter your last name: ")
            Username = str(first_name[0])   str(last_name)
            Password = str(first_name[0])   str(last_name)   str('1!')
            print("Username: ", Username.upper(), file=f)
            print("Password: ", Password.upper(), file=f)
            print("\n")

    login()