Welcome folks today in this blog post we will be building a todo list widget dynamically using entry text input in tkinter gui desktop app in python. All the full source code of the application is given below.

Get Started

In order to get started you need to install the below library using the pip command as shown below

pip install tkinter

After installing this library you need to make an app.py file and copy paste the following code

app.py

import tkinter as tk

class Todo(tk.Tk):
    def __init__(self, tasks=None):
        super().__init__()

        if not tasks:
            self.tasks = []
        else:
            self.tasks = tasks

        self.title("To-Do App v1")
        self.geometry("300x400")

        todo1 = tk.Label(self, text="--- Add Items Here ---", bg="lightgrey", fg="black", pady=10)

        self.tasks.append(todo1)

        for task in self.tasks:
            task.pack(side=tk.TOP, fill=tk.X)

        self.task_create = tk.Text(self, height=3, bg="white", fg="black")

        self.task_create.pack(side=tk.BOTTOM, fill=tk.X)
        self.task_create.focus_set()

        self.bind("<Return>", self.add_task)

        self.colour_schemes = [{"bg": "lightgrey", "fg": "black"}, {"bg": "grey", "fg": "white"}]

    def add_task(self, event=None):
        task_text = self.task_create.get(1.0,tk.END).strip()

        if len(task_text) > 0:
            new_task = tk.Label(self, text=task_text, pady=10)

            _, task_style_choice = divmod(len(self.tasks), 2)

            my_scheme_choice = self.colour_schemes[task_style_choice]

            new_task.configure(bg=my_scheme_choice["bg"])
            new_task.configure(fg=my_scheme_choice["fg"])

            new_task.pack(side=tk.TOP, fill=tk.X)

            self.tasks.append(new_task)

        self.task_create.delete(1.0, tk.END)

if __name__ == "__main__":
    todo = Todo()
    todo.mainloop()

If you execute the above python script by typing the below command

python app.py