tuple() -> empty tuple tuple(iterable) -> tuple initialized from iterable's items If the argument is a tuple, the return value is the same object. """ def count(self, value): # real signature unknown; restored from __doc__ ""...
也可以使用tuple()创建一个元组: 不指定参数时,返回一个空元组 使用tuple作为参数时,返回该参数的浅拷贝 其他参数时,尝试将给定的对象转换为tuple类型 1.1.2 元组索引和分片 代码语言:javascript 代码运行次数:0 运行 AI代码解释 tup=('first',5,'white','dog')print(tup[1])print(tup[-2])print(tup[1:...
3.1. Tuple 转换为 Dict: my_tuple = (('a', 1), ('b', 2), ('c', 3))tuple_to_dict = dict(my_tuple)print(tuple_to_dict) 3.2. Tuple 转换为 List: my_tuple = (1, 2, 3)tuple_to_list = list(my_tuple)print(tuple_to_list) 3.3. Tuple 转换为 Set: my_tuple = (1, 2, ...
classCustomTuple(tuple):def__class_getitem__(cls,index):ifindex==0:return'First element'elifindex==1:return'Second element'else:return'Invalid index'# 创建自定义元组对象custom_tuple=CustomTuple()# 使用索引访问元素print(custom_tuple[0])# 输出:First elementprint(custom_tuple[1])# 输出...
tuple(iterable)-> tuple initializedfromiterable's itemsIf the argumentisa tuple, thereturnvalueisthe same object. 由于元组创建后不能进行修改的特性,故其内置方法较少(不能增删改,只能查): defcount(self, value):"""T.count(value) -> integer -- return number of occurrences of value"""return0 ...
元组tuple官方文档解析 classtuple(object):""" tuple() -> empty tuple tuple(iterable) -> tuple initialized from iterable's items If the argument is a tuple, the return value is the same object. """defcount(self, value):# real signature unknown; restored from __doc__""" T.count(value...
{([1,2],3,4):'tuple'}# TypeError: unhashable type: 'list' 与类型名 dict 同名,Python 的内置函数有 dict() 。用 dict() 可以创建一个空字典(直接用 dct = {} 也能创建空字典),其布尔值是 False 。 dct=dict()# (2)dct# {}bool(dct)# False ...
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...
lang_dict)lang_dict['Third'] = 'Ruby' #adding key-value pairprint(lang_dict)Output:{'First': 'Python', 'Second': 'Java'}{'First': 'Python', 'Second': 'C++'}{'First': 'Python', 'Second': 'C++','Third': 'Ruby'}访问字典中的元素：字典中的元素只能使用键访问，可以使用get()...
Equivalent to attrib.keys() """ return self.attrib.keys() def items(self): 获取当前节点的所有属性值,每个属性都是一个键值对 """Get element attributes as a sequence. The attributes are returned in arbitrary order. Equivalent to attrib.items(). Return a list of (name, value) tuples. ""...