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| def borrow_book(self):
self.borrow_window = tk.Toplevel(self.master)
self.borrow_window.title("借书")
barcode_label = tk.Label(self.borrow_window, text="书目的唯一号:")
self.barcode_entry = tk.Entry(self.borrow_window)
borrow_btn = tk.Button(self.borrow_window, text="借阅", command=self.borrow_book_from_db)
cancel_btn = tk.Button(self.borrow_window, text="取消", command=self.borrow_window.destroy)
barcode_label.pack()
self.barcode_entry.pack()
borrow_btn.pack()
cancel_btn.pack()
|
$$ H(x)=-\sum{n}{i=1}p(x_i)logp(x_i) $$
