PYTHON_67 special Member of object-oriented class Setitem/getitem/delitem

#成员的种类: Normal field  static field normal  method   static method  class method  General characteristics
Class FFF:
    x= ' xxxxxdddd '
    __x1= ' x11111111 ' __ ' is a member modifier, and X1 is the modified variable field that is only accessed internally
    def __init__ (self):
        Print (' 111 ')
        Self.__name= ' name222 '  #这个name依旧是那个私有的字段  is still not to be called
    def fetch (Self,bak):
        Print (BAK)
        Print (FFF.__X1)
    def __call__ (self, *args, **kwargs):
        Print (' calll1111 ')



Class Bar (FFF):
    def fetch (self):
        Print (' Bbbbar ')

Bbb=bar ()
BBB ()
bbb[' K1 ']
Output ————————————————————————————————————————————————————————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————

Traceback (most recent):
File "d:/users/administrator/pycharmprojects/untitled/venv/yingshe/chengyuanxiushifu.py", line A, in <module >
bbb[' K1 ']=5
TypeError: ' Bar ' object does not support item assignment
111
calll1111

This bbb[' K1 ' is an error because there is no way to call the Add Member __getitem__ ()

*************************************************************************************************************** *************************************************************************************************************** ************************************************

#成员的种类: Normal field  static field normal  method   static method  class method  General characteristics
Class FFF:
    x= ' xxxxxdddd '
    __x1= ' x11111111 ' __ ' is a member modifier, and X1 is the modified variable field that is only accessed internally
    def __init__ (self):
        Print (' 111 ')
        Self.__name= ' name222 '  #这个name依旧是那个私有的字段  is still not to be called
    def fetch (Self,bak):
        Print (BAK)
        Print (FFF.__X1)
    def __call__ (self, *args, **kwargs):
        Print (' calll1111 ')
    def __getitem__ (self, item):
        Print (item)



Class Bar (FFF):
    def fetch (self):
        Print (' Bbbbar ')

Bbb=bar ()
BBB ()
bbb[' K1 ']  #中括号 The default execution of GetItem methods  and the SetItem Delitem method   This set of operations is modeled after the dictionary operation
Output ————————————————————————————————————————————————————————————————————————————————————————————————————————————— —————————————————————————————————

111
calll1111
K1

Here we go, no more errors.

*************************************************************************************************************** *************************************************************************************************************** ***********************************************

#成员的种类: Normal field  static field normal  method   static method  class method  General characteristics
Class FFF:
    x= ' xxxxxdddd '
    __x1= ' x11111111 ' __ ' is a member modifier, and X1 is the modified variable field that is only accessed internally
    def __init__ (self):
        Print (' 111 ')
        Self.__name= ' name222 '  #这个name依旧是那个私有的字段  is still not to be called
    def fetch (Self,bak):
        Print (BAK)
        Print (FFF.__X1)
    def __call__ (self, *args, **kwargs):
        Print (' calll1111 ')
    def __getitem__ (self, item):
        Print (item)
    def __setitem__ (self, Key, value):
        Print (Key,value)



Class Bar (FFF):
    def fetch (self):
        Print (' Bbbbar ')

Bbb=bar ()
BBB ()
bbb[' K1 ']=123
Output ————————————————————————————————————————————————————————————————————————————————————————————————————————————— —————————————————————————

111
calll1111
K1 123

*************************************************************************************************************** *************************************************************************************************************** ***********************************************

#成员的种类: Normal field  static field normal  method   static method  class method  General characteristics
Class FFF:
    x= ' xxxxxdddd '
    __x1= ' x11111111 ' __ ' is a member modifier, and X1 is the modified variable field that is only accessed internally
    def __init__ (self):
        Print (' 111 ')
        Self.__name= ' name222 '  #这个name依旧是那个私有的字段  is still not to be called
    def fetch (Self,bak):
        Print (BAK)
        Print (FFF.__X1)
    def __call__ (self, *args, **kwargs):
        Print (' calll1111 ')
    def __getitem__ (self, item):
        Print (item)
    def __setitem__ (self, Key, value):
        Print (Key,value)
    def __delitem__ (self, key):
        Print (' Delitem ')



Class Bar (FFF):
    def fetch (self):
        Print (' Bbbbar ')

Bbb=bar ()
BBB ()
bbb[' K1 ']=123
Del bbb[' K1 ']
Output ————————————————————————————————————————————————————————————————————————————————————————————————————————————— ———————————————————————————————————————

111
calll1111
K1 123
Delitem

*************************************************************************************************************** *************************************************************************************************************** **********************************************

*************************************************************************************************************** *************************************************************************************************************** **********************************************

PYTHON_67 special Member of object-oriented class Setitem/getitem/delitem