python的collection系列-可命名元组（namedtuple）

import collections
#创建类
MytupleClass = collections.namedtuple("MytupleClass",["x","y","z"])
obj = MytupleClass(11,22,33)
print(obj.x)
print(obj.y)
print(obj.z)     #应用于坐标
#print(help(MytupleClass))     #查看创建的类有哪些功能

#执行结果：
11
22
33

源码：

class MytupleClass(builtins.tuple)
 |  MytupleClass(x, y, z)
 |  
 |  Method resolution order:
 |      MytupleClass
 |      builtins.tuple
 |      builtins.object
 |  
 |  Methods defined here:
 |  
 |  __getnewargs__(self)
 |      Return self as a plain tuple.  Used by copy and pickle.
 |  
 |  __getstate__(self)
 |      Exclude the OrderedDict from pickling
 |  
 |  __repr__(self)
 |      Return a nicely formatted representation string
 |  
 |  _asdict(self)
 |      Return a new OrderedDict which maps field names to their values.
 |  
 |  _replace(_self, **kwds)
 |      Return a new MytupleClass object replacing specified fields with new values
 |  
 |  ----------------------------------------------------------------------
 |  Class methods defined here:
 |  
 |  _make(iterable, new=<built-in method __new__ of type object at 0x684357D0>, len=<built-in function len>) from builtins.type
 |      Make a new MytupleClass object from a sequence or iterable
 |  
 |  ----------------------------------------------------------------------
 |  Static methods defined here:
 |  
 |  __new__(_cls, x, y, z)
 |      Create new instance of MytupleClass(x, y, z)
 |  
 |  ----------------------------------------------------------------------
 |  Data descriptors defined here:
 |  
 |  __dict__
 |      A new OrderedDict mapping field names to their values
 |  
 |  x
 |      Alias for field number 0
 |  
 |  y
 |      Alias for field number 1
 |  
 |  z
 |      Alias for field number 2
 |  
 |  ----------------------------------------------------------------------
 |  Data and other attributes defined here:
 |  
 |  _fields = ('x', 'y', 'z')
 |  
 |  _source = "from builtins import property as _property, tupl..._itemget...
 |  
 |  ----------------------------------------------------------------------
 |  Methods inherited from builtins.tuple:
 |  
 |  __add__(self, value, /)
 |      Return self+value.
 |  
 |  __contains__(self, key, /)
 |      Return key in self.
 |  
 |  __eq__(self, value, /)
 |      Return self==value.
 |  
 |  __ge__(self, value, /)
 |      Return self>=value.
 |  
 |  __getattribute__(self, name, /)
 |      Return getattr(self, name).
 |  
 |  __getitem__(self, key, /)
 |      Return self[key].
 |  
 |  __gt__(self, value, /)
 |      Return self>value.
 |  
 |  __hash__(self, /)
 |      Return hash(self).
 |  
 |  __iter__(self, /)
 |      Implement iter(self).
 |  
 |  __le__(self, value, /)
 |      Return self<=value.
 |  
 |  __len__(self, /)
 |      Return len(self).
 |  
 |  __lt__(self, value, /)
 |      Return self<value.
 |  
 |  __mul__(self, value, /)
 |      Return self*value.n
 |  
 |  __ne__(self, value, /)
 |      Return self!=value.
 |  
 |  __rmul__(self, value, /)
 |      Return self*value.
 |  
 |  __sizeof__(...)
 |      T.__sizeof__() -- size of T in memory, in bytes
 |  
 |  count(...)
 |      T.count(value) -> integer -- return number of occurrences of value
 |  
 |  index(...)
 |      T.index(value, [start, [stop]]) -> integer -- return first index of value.
 |      Raises ValueError if the value is not present.