print("The Student age using index is : ", end="")print(S[1])# Access using name print("The Student name using keyname is : ", end="")print(S.name)# Access using getattr()print("The Student DOB using getattr() is : ", end="")print(getattr(S, 'DOB'))输出 The Student age...
['name','age','DOB'])# Adding valuesS=Student('Nandini','19','2541997')# using _fields to display all the keynames of namedtuple()print("All the fields of students are : ")print(S._fields)# ._replace returns a new namedtuple...
参考https://stackoverflow.com/questions/2970608/what-are-named-tuples-in-python 先上例子,用tuple和namedtuple分别表示点(x, y),然后计算两个点的距离 1. 用tuple表示点,从例子可见计算两个点的距离非常麻烦且可读性差 pt1 = (1.0,5.0) pt2 = (2.5,1.5)frommathimportsqrt line_length = sqrt((pt1...
result=type(typename, (tuple,), class_namespace)# 动态创建类#For pickling to work, the __module__ variable needs to be set to the frame#where the named tuple is created. Bypass this step in environments where#sys._getframe is not defined (Jython for example) or sys._getframe is not...
python 3 命名元组named tuple使用方法 简介 本经验介绍在python 3编程时，命名元组named tuple构造，读写方法以及注意事项。工具/原料 python 3 VSCode 方法/步骤 1 python 3的命名元组在collections模块内，如图。构造命名元组非常简单，使用namedtuple然后指定类型名和各个字段名。2 各个字段名除了可以写成一个字符串...
print(S.name) 输出 The Student age using index is : 19 The Student name using keyname is : Nandini 让我们看看namedtuple()上的各种操作。 1. 访问操作 按索引访问:namedtuple()的属性值是有序的,可以使用索引号访问,不像字典不能通过索引访问。按key访问:在字典中也允许通过key进行访问。使用getattr()...
Tuple = ("a", "b", "c") # Packing (x, y, z) = Tuple # ValueError: too many values to unpack (expected 2) (x, y, z, i) = Tuple # ValueError: not enough values to unpack (expected 4, got 3) 8. Named tuples Python提供了一种来自模块的特殊类型的函数,名为namedtuple()collec...
Tuple=("a","c","b","d","f","e")sortedTuple=sorted(Tuple)print(sortedTuple)#("a","b","c","d","e","f") 6. Repetition and Concatenation of Tuples 要重复元组的所有元素,请将其乘以所需因子N。 重复 Tuple=("a","b")repeatedTuple=Tuple*3print(repeatedTuple)#('a','b','a'...
在内部使用namedtuples,但我想保持与提供普通元组的用户的兼容性。 from collections import namedtuple tuplePi=(1,3.14,"pi")#Normal tupleRecord=namedtuple("MyNamedTuple", ["ID","Value","Name"]) namedE=Record(2, 2.79,"e")#Named tuplenamedPi=Record(tuplePi)#ErrorTypeError: __new__() missing...
tuple.__new__ _dict, _tuple, _len, _map, _zip = dict, tuple, len, map, zip # Create all the named tuple methods to be added to the class namespace s = f'def __new__(_cls, {arg_list}): return _tuple_new(_cls, ({arg_list}))' namespace = {'_tuple_new': tuple_new...