Python notes: Classes and inheritance

2. #-*-coding= utf-8-*-
4. # The syntax rules for file encoding definitions are: coding[:=]/s* ([-/w.] +)
6. # no encoding specified will default to: ASCII
8. # also be aware that the encoding of the physical file must conform to the encoding specified in this language
10. # More reference: http://python.org/dev/peps/pep-0263/
12. Class CBase:
14. "'Resource Related class ' ' # passed cbase.__doc__ or class instance. __doc__ can output this description
16. Counter = 0; # This is a variable belonging to a class, equivalent to a static variable of C + +, public
18. __counter = 1; # variable with double underline, will be considered as private variable
20. # cannot be accessed outside the class, otherwise it is considered to be a public variable
22. the __init__ in #在Python corresponds to the constructor of C + +.
24. #在__init__中定义的是对象的变量, the equivalent of C + + common variables
26. def __init__ (self,name):
28. self.name = name # Ordinary object variable, public
30. self.__private1 = 2 # Private normal variable, private
32. print (' __init__ base ')
36. # __del__ equivalent to C + + destructor
38. def __del__ (self):
40. print (' base destruct ')
44. # Any one class method must have at least one parameter
46. # This parameter is equivalent to C + + 's this pointer
48. # This parameter must be the first parameter
50. # Conventions usually write self
52. def help (self):
54. "HelpDoc" # method of doc, reference syntax [class name | instance]. Method name. __doc__
56. print ('---base help begin---/n ',self.name) # Reference class common variables here
58. print (cbase.__counter) # Even if a method of this class refers to its own static variable,
60. # also need to add class name or self-limit
62. print (self.__private1) #私有变量只有本类方法有权限引用
64. print ('---base help end---/n ')
68. def Test (self):
70. print (' Base Test ')
76. # Inheritance of Classes
78. # Multiple inheritance can be performed, Syntax class CC (CA,CB)
80. Class Chigh (CBase):
82. def __init__ (self):
84. Cbase.__init__ (self,' high ') # When invoking the construction of a base class, to manually pass in the first parameter
86. print (' __init__ high ')
90. def __del__ (self):
92. #CBase. __del__ (self), the destructor of the base class is not callable
94. # destructors for the base class are not automatically called
96. print (' High destruct ')
100. # Inheriting a method of a class overrides the method with the same name as the base class
102. def Test (self):
104. print (' High Test ')
108. # Python does not have the concept of method overloading
110. # The last method defined in the source file will overwrite the previous method with the same name
112. # Now in the call to test, the second parameter must be passed the name
114. # The test method with one parameter above is overwritten.
116. def Test (self,name):
118. print (' High Test has arg: ', name)
122. RH = Chigh ()
124. #rh = CBase (' Hello ')
126. Thh Help ()
128. Thh Test ();
130. Print (Cbase.counter)
132. Print (Rh.name)

Python notes: Classes and inheritance