摘要：今天遇到 mongoose db.once（'open'）没执行回调 mongoose.connect('mongodb://localhost/test'); var db = mongoose.connection; db.once('open', function() { console.lo 阅读全文

摘要：import tkinter as tk from PIL import Image, ImageTk from time import time, sleep from random import choice, uniform, randint from math import sin, cos 阅读全文