python的collection系列-可命名元组（namedtuple）

 1 import collections
 2 #创建类
 3 MytupleClass = collections.namedtuple("MytupleClass",["x","y","z"])
 4 obj = MytupleClass(11,22,33)
 5 print(obj.x)
 6 print(obj.y)
 7 print(obj.z)     #应用于坐标
 8 #print(help(MytupleClass))     #查看创建的类有哪些功能
 9
10 #执行结果：
11 11
12 22
13 33

源码：

  1 class MytupleClass(builtins.tuple)
  2  |  MytupleClass(x, y, z)
  3  |
  4  |  Method resolution order:
  5  |      MytupleClass
  6  |      builtins.tuple
  7  |      builtins.object
  8  |
  9  |  Methods defined here:
 10  |
 11  |  __getnewargs__(self)
 12  |      Return self as a plain tuple.  Used by copy and pickle.
 13  |
 14  |  __getstate__(self)
 15  |      Exclude the OrderedDict from pickling
 16  |
 17  |  __repr__(self)
 18  |      Return a nicely formatted representation string
 19  |
 20  |  _asdict(self)
 21  |      Return a new OrderedDict which maps field names to their values.
 22  |
 23  |  _replace(_self, **kwds)
 24  |      Return a new MytupleClass object replacing specified fields with new values
 25  |
 26  |  ----------------------------------------------------------------------
 27  |  Class methods defined here:
 28  |
 29  |  _make(iterable, new=<built-in method __new__ of type object at 0x684357D0>, len=<built-in function len>) from builtins.type
 30  |      Make a new MytupleClass object from a sequence or iterable
 31  |
 32  |  ----------------------------------------------------------------------
 33  |  Static methods defined here:
 34  |
 35  |  __new__(_cls, x, y, z)
 36  |      Create new instance of MytupleClass(x, y, z)
 37  |
 38  |  ----------------------------------------------------------------------
 39  |  Data descriptors defined here:
 40  |
 41  |  __dict__
 42  |      A new OrderedDict mapping field names to their values
 43  |
 44  |  x
 45  |      Alias for field number 0
 46  |
 47  |  y
 48  |      Alias for field number 1
 49  |
 50  |  z
 51  |      Alias for field number 2
 52  |
 53  |  ----------------------------------------------------------------------
 54  |  Data and other attributes defined here:
 55  |
 56  |  _fields = (‘x‘, ‘y‘, ‘z‘)
 57  |
 58  |  _source = "from builtins import property as _property, tupl..._itemget...
 59  |
 60  |  ----------------------------------------------------------------------
 61  |  Methods inherited from builtins.tuple:
 62  |
 63  |  __add__(self, value, /)
 64  |      Return self+value.
 65  |
 66  |  __contains__(self, key, /)
 67  |      Return key in self.
 68  |
 69  |  __eq__(self, value, /)
 70  |      Return self==value.
 71  |
 72  |  __ge__(self, value, /)
 73  |      Return self>=value.
 74  |
 75  |  __getattribute__(self, name, /)
 76  |      Return getattr(self, name).
 77  |
 78  |  __getitem__(self, key, /)
 79  |      Return self[key].
 80  |
 81  |  __gt__(self, value, /)
 82  |      Return self>value.
 83  |
 84  |  __hash__(self, /)
 85  |      Return hash(self).
 86  |
 87  |  __iter__(self, /)
 88  |      Implement iter(self).
 89  |
 90  |  __le__(self, value, /)
 91  |      Return self<=value.
 92  |
 93  |  __len__(self, /)
 94  |      Return len(self).
 95  |
 96  |  __lt__(self, value, /)
 97  |      Return self<value.
 98  |
 99  |  __mul__(self, value, /)
100  |      Return self*value.n
101  |
102  |  __ne__(self, value, /)
103  |      Return self!=value.
104  |
105  |  __rmul__(self, value, /)
106  |      Return self*value.
107  |
108  |  __sizeof__(...)
109  |      T.__sizeof__() -- size of T in memory, in bytes
110  |
111  |  count(...)
112  |      T.count(value) -> integer -- return number of occurrences of value
113  |
114  |  index(...)
115  |      T.index(value, [start, [stop]]) -> integer -- return first index of value.
116  |      Raises ValueError if the value is not present.