from collections import OrderedDict d = OrderedDict.fromkeys('abcde') d.move_to_end('b') ''.join(d) d.move_to_end('b', last=False) ''.join(d) 运行效果如下 不可变集合(frozenset) 不可变集合是指一旦创建内容就不再发生变化的集合,他是一种不可变的、可哈希的、无序的集合,其元素是唯一的...
move_to_end('age') # 默认移动到最后 print(f"移动后的值为:{odict}") # 移动后的值为:OrderedDict({'name': '张三', 'grade': '二年级', 'age': 24}) except KeyError as e: print(f'当前处理的key值{e}不存在') d = OrderedDict.fromkeys('abcde') print(d, type(d)) # OrderedDict(...
class LastUpdatedOrderedDict(OrderedDict): """This code works in Python 2 and Python 3""" def __setitem__(self, key, value): super(LastUpdatedOrderedDict, self).__setitem__(key, value) self.move_to_end(key) 现在super的两个参数都是可选的。Python 3 字节码编译器在调用方法中的super()时...
items move_to_end:将指定的键值对移动到最后的位置: 1 import collections 2 dic1 = collections.OrderedDict({'name':'jack','age':20,'job':'IT'}) 3 dic1.move_to_end("name") #将name移动到最后的位置 4 #print(dic1.pop("age")) 5 print(dic1) 6 7 执行结果: 8 OrderedDict([('age'...
可以看到之前排在第一位的 bar被移到最后一位了。move_to_end 还接收一个关键字参数 last。last 默认为 True,当 last = False 的时候,表示将该键移动到最前面! 2.2 删除 key_value 如果我们要删除有序字典中的 key-value, 可以使用 popitem 方法, popitem(last=True) 按照先进后出的顺序删除 dict中 的 ...
# from the book: Automate the Boring Stuff with Python print('Press Ctrl-C to quit.') try: while True: # Get and print the mouse coordinates. x, y = pyautogui.position() positionStr = 'X: ' + str(x).rjust(4) + ' Y: ' + str(y).rjust(4) print(positionStr,end = '')...
('飞机大战 —— 九歌') num_player = StartInterface(screen, cfg) if num_player == 1: while True: GamingInterface(num_player=1, screen=screen) EndInterface(screen, cfg) else: while True: GamingInterface(num_player=2, screen=screen) EndInterface(screen, cfg) '''run'''if __name__ =...
OrdredDict,是一个有序字典,key是按照插入顺序排列,不是key本身序列 AI检测代码解析 from collections import OrderedDict d = OrderedDict.fromkeys('edcba') print(d.popitem()) print(d) d.move_to_end('c') print(d) print(''.join(d.keys())) 1. 2. 3. 4. 5. 6. 7. 8....
listbox.insert(tk.END, new_item) listbox.insert(tk.END,"---") listbox.yview(tk.END) root.after(1000, update_listbox) defcopy_to_clipboard(event): selected_item = listbox.get(listbox.curselection()) ifselected_item: pyperclip.copy...
If you want your decorator to also take arguments, then you need to nest the wrapper function inside another function. In this case, you usually end up with three return statements. You can download the code from this tutorial by clicking below: Get Your Code: Click here to download the ...