字典
字典由一些列鍵-值對構成,鍵值對包含在一對花括號裏。鍵值用冒號分割,多個鍵值用逗號分隔。
創建字典
elist={1:"小貓",3:"小狗",5:"黃牛"} print(type(elist)) print(elist[3]) //小狗
字典數據修改
print("=========================") elist={1:"小貓",3:"小狗",5:"黃牛"} print(type(elist)) print(elist[3]) #修改元素 elist[3] = "羊" #添加元素 elist[7] = "水牛" #刪除元素 del elist[1] for key,value in elist.items(): print(key,value)
遍歷字典
print("=========================") elist={1:"小貓",3:"小狗",5:"黃牛"} print(type(elist)) print(elist[3]) #修改元素 elist[3] = "羊" #添加元素 elist[7] = "水牛" #刪除元素 del elist[1] #遍歷鍵值 for key,value in elist.items(): print(key,value) print("=========================") #遍歷所有鍵 for key in elist.keys(): print(key) print("=========================") #遍歷所有值 for value in elist.values(): print(value) print("=========================")