defnamedtuple(typename, field_names, *, rename=False, defaults=None, module=None):"""Returns a new subclass of tuple with named fields. >>> Point = namedtuple('Point', ['x', 'y']) >>> Point.__doc__ # docstring for the new class 'Point(x, y)' >>> p = Point(11, y=22) ...
{name} = _property(_itemgetter({index:d}), doc='Alias for field number {index:d}')'''defnamedtuple(typename, field_names, *, verbose=False, rename=False, module=None):"""Returns a new subclass of tuple with named fields. >>> Point = namedtuple('Point', ['x', 'y']) >>> Poi...
def namedtuple(typename, field_names, *, rename=False, defaults=None, module=None): """Returns a new subclass of tuple with named fields. >>> Point = namedtuple('Point', ['x', 'y']) >>> Point.__doc__ # docstring for the new class 'Point(x, y)' >>> p = Point(11, y=22...
OrderedDict dict subclass that remembers the order entries were added defaultdict dict subclass that calls a factory function to supply missing values namedtuple 主要用于对tuple里面的分量进行命名,生成一个tuple的子类,这个子类继承了原来的tuple类,有相同的属性方法。 代码语言:javascript 代码运行次数:0 运行 ...
8/4 0.000 0.000 0.000 0.000 abc.py:196(__subclasscheck__) 15 0.000 0.000 0.000 0.000 {built-in method posix.stat} 6 0.000 0.000 0.000 0.000 {built-in method builtins.__build_class__} 1 0.000 0.000 0.000 0.000 __init__.py:357(namedtuple) 48 0.000 0.000 0...
{field_defs} """ _repr_template = '{name}=%r' _field_template = '''\ {name} = _property(_itemgetter({index:d}), doc='Alias for field number {index:d}') ''' def namedtuple(typename, field_names, *, verbose=False, rename=False, module=None): """Returns a new subclass of ...
collections.namedtuple(typename, field_names, *, rename=False, defaults=None, module=None) 1. 语法说明: 返回值为:一个新的元组子类(a new tuple subclass),子类的名称为入参typename。这个新的子类用于创建类似元组的对象(tuple-like objects),可以通过字段名来获取属性(attribute)值,同样也可以通过索引(inde...
在内置数据类型(dict、list、set、tuple)的基础上,collections模块还提供了几个额外的数据类型:Counter、deque、defaultdict、namedtuple和OrderedDict等。 1.namedtuple: 生成可以使用名字来访问元素内容的tuple 2.deque: 双端队列,可以快速的从另外一侧追加和推出对象 ...
fromcollectionsimportnamedtuple# 首先定义一个namedtuple类# 类的名字是 "Point", 它有两个属性 x 和 y; 先不要管为什么前后有两个“Point”,暂时当约定俗成Point=namedtuple('Point',['x','y'])# namedtuple最简单的初始化方式: `p = Point(11,22)`, 但是可维护性差,推荐使用下面的初始化:p=...
NamedTuple 类型: from typing import NamedTuple Point = NamedTuple('Point', [('x', int), ('y', int)]) p = Point(x=1, y='x') # Argument has incompatible type "str"; expected "int" TypeVar 任意类型: from typing import TypeVar ...