#create a tuple tuplex= tuple("index tuple") print(tuplex) #getindex of the first item whose valueispassedasparameter index= tuplex.index("p") print(index)#definethe index from which you want to searchindex= tuplex.index("p",5) print(index)#definethe segment of the tuple to be search...
my_dict = {'name':'Frank','age':50,'city':'Paris'}# 使用del关键字delmy_dict['age']# 使用pop()方法city = my_dict.pop('city')# 删除并返回最后插入的项last_item = my_dict.popitem()print(my_dict)# 输出: {} 3. 字典方法 Python字典提供了多种有用的方法: my_dict = {'a':1,'...
append("张三") #不允许添加:tuple' object has no attribute 'append' tu[0] = "日元" #不允许修改 :object does not support item assignment del tu[2] #报错,不允许删除:'tuple' object doesn't support item deletion print(tu[2]) #索引就可以 #欧元 #关于元组不可变的注意点...
# Two ways to create an empty tuple empty_tuple = () empty_tuple = tuple() # Use parentheses for tuples, square brackets for lists names = ("Zach", "Jay") # Index print(names[0]) # Get length len(names) # Create a tuple with a single item, the comma is important single = ...
元组(tuple)是包含多个元素的类型,元素之间用逗号分割如:t1 =(123,456,"hello") 可以通过把若干元素放在一对圆括号中创建元组,如果只有一个元素的话则需要多加一个逗号,例如(3,)。 也可以使用tuple()函数把列表、字典、集合、字符串以及range对象、map对象、zip对象或其他类似对象转换为元组。 元组可以是空的,...
Remember that the first item has index 0.By leaving out the start value, the range will start at the first item:Example This example returns the items from the beginning to, but NOT included, "kiwi": thistuple = ("apple", "banana", "cherry", "orange", "kiwi", "melon", "mango")...
fromoperatorimportitemgetter# (first name, last name, score) tuplesgrade=[('Freddy','Frank',3),('Anil','Frank',100),('Anil','Wang',24)]sorted(grade,key=itemgetter(1,0))# [('Anil', 'Frank', 100), ('Freddy', 'Frank', 3), ('Anil', 'Wang', 24)]sorted(grade,key=itemgetter...
ExampleGet your own Python Server Create a Tuple: thistuple = ("apple","banana","cherry") print(thistuple) Try it Yourself » Tuple Items Tuple items are ordered, unchangeable, and allow duplicate values. Tuple items are indexed, the first item has index[0], the second item has index...
my_tuple[0]=10# TypeError: 'tuple' object does not support item assignment # 可以重新赋值my_tuple=(10,'apple') 3. 集合(set) 集合是一个无序的不重复元素序列 集合用方括号{}表示,元素之间用逗号,分隔 3.1 创建集合 方式一:set_name = {element1, element2, ..., elementn} ...
print(isinstance(b,tuple)) for i in b: print(i) print(type(i)) c=tuple(b) print(c) sorted(b) for name in sorted(b): print(name) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 1) 返回的是一个dict_item类型,不是元组也不是列表dict_items([('a', 'xiao'), ...