username_creator.py

# Realeased under the MIT Licence

import tkinter
from tkinter import *
from tkinter import messagebox

class UsernameWindow:
    def __init__(self, appUsername):
        #Add some text:
        self.firstTitle = tkinter.Label(appUsername, text="First Name:", font=('Helvetica', 10))
        self.firstTitle.grid(row=1, column=0, padx=7.5, pady=7.5)
        
        self.first = Entry(appUsername)
        self.first.grid(row=1, column=1, padx=7.5, pady=7.5)
        self.first.focus_set()
        
        self.lastTitle = tkinter.Label(appUsername, text="Last Name:", font=('Helvetica', 10))
        self.lastTitle.grid(row=2, column=0, padx=7.5, pady=7.5)
        
        self.last = Entry(appUsername)
        self.last.grid(row=2, column=1, padx=7.5, pady=7.5)

        self.ageTitle = tkinter.Label(appUsername, text="Your Age:", font=('Helvetica', 10))
        self.ageTitle.grid(row=3, column=0, padx=7.5, pady=7.5)
        
        self.age = Entry(appUsername)
        self.age.grid(row=3, column=1, padx=7.5, pady=7.5)
        
        self.buttonSubmit = Button(appUsername, text="Create", command=self.createUsername)
        self.buttonSubmit.grid(row=4, column=0, columnspan=2, padx=7.5, pady=7.5)



    def createUsername(self):
        firstName = self.first.get().replace(" ", "") #Sets variable & Removes any spaces! [[But abit glitchy if space is in the middle of a word :?]] FIXED!! Now removes spaces within the middle! :D
        lastName = self.last.get().replace(" ", "")
        userAge = self.age.get().replace(" ", "")
        
        firstName = firstName[:4]
        lastName = lastName[-3:]
        userAge = userAge[:2]
        FINAL = firstName+lastName+userAge

        if len(self.first.get()) < 4:
            try:
                self.txt.destroy() #Refreshes
            except:None
            print("No first name")
            self.txt = tkinter.Label(text="Please enter your first name. 4+ Characters.", font=('Helvetica', 10))
            self.txt.grid(row=0, column=0, columnspan=2, padx=7.5, pady=7.5)

        elif len(self.last.get()) < 3:
            try:
                self.txt.destroy() #Refreshes
            except:None
            print("No last name")
            self.txt = tkinter.Label(text="Please enter your last name. 3+ Characters.", font=('Helvetica', 10))
            self.txt.grid(row=0, column=0, columnspan=2, padx=7.5, pady=7.5)

        elif len(self.age.get()) == 0:
            try:
                self.txt.destroy() #Refreshes
            except:None
            print("No age")
            self.txt = tkinter.Label(text="Please enter your age.", font=('Helvetica', 10))
            self.txt.grid(row=0, column=0, columnspan=2, padx=7.5, pady=7.5)

        else:
            try:
                self.txt.destroy() #Refreshes
            except:None
            self.txt = tkinter.Label(text=FINAL, font=('Helvetica', 10))
            self.txt.grid(row=0, column=0, columnspan=2, padx=7.5, pady=7.5)
            try:        
                toFile = open("usernames.txt", "a")

                toFile.write("Username: "+FINAL+"\n")

                toFile.close()
            except: ## Incase of unknow errors occuring to protect the file
                messagebox.showinfo("Eh?", "ERROR: An unknow error occured.")
                print ("\tERROR: An unknow error occured.")
                try:
                    toFile.close()
                except:
                    messagebox.showinfo("Eh?", "ERROR: Unable to close file, please exit to prevent system errors!!!")
                    print ("\tERROR: Unable to close file, please exit to prevent system errors!!!")



## First window to open
Username = Tk()
Username.title("Generate Username") # Sets title
Username.geometry("300x200")
Username.columnconfigure(0, weight=100)
Username.columnconfigure(1, weight=100)
app_Username = UsernameWindow(Username)

mainloop()