quote_app.py

import json
from tkinter import Tk
from tkinter.ttk import Button, Frame, Label
from typing import Callable, Literal
from urllib.request import urlopen

FetchDataType = dict[Literal["q"] | Literal["a"], str]


def parse_zen_data(data: bytes) -> FetchDataType:
    return json.loads(data)[0]


def fetch_zen_quote(
    url: str = "https://zenquotes.io/api/random",
    parse: Callable[[bytes], FetchDataType] = parse_zen_data,
) -> FetchDataType:
    with urlopen(url) as response:
        data = response.read()
        return parse(data)


class App(Tk):
    def __init__(
        self, fetch_quote: Callable[[], FetchDataType] = fetch_zen_quote
    ) -> None:
        super().__init__()
        self.fetch_quote = fetch_quote
        self.title("Zen quotes")
        self.resizable(width=False, height=False)
        self._configure_widgets()
        self._update_zen_quote()

    def _configure_widgets(self) -> None:
        frame = Frame(self, padding=16)
        frame.grid()
        self.quote_label = Label(frame, padding=6)
        self.quote_label.grid(column=0, row=0, columnspan=2)
        self.author_label = Label(frame, padding=6)
        self.author_label.grid(column=0, row=1, sticky="w", columnspan=2, pady=(0, 6))
        Button(frame, text="New quote", command=self._update_zen_quote).grid(
            column=0, row=2, sticky="w"
        )
        Button(frame, text="Quit", command=self.destroy).grid(
            column=1, row=2, sticky="e"
        )

    def _update_zen_quote(self) -> None:
        data = self.fetch_quote()
        self.quote_label["text"] = data["q"]
        self.author_label["text"] = f"Author: {data['a']}"

    def run(self) -> None:
        self.mainloop()


if __name__ == "__main__":
    App().run()