Private property and private methods
01. scenarios and define the way
Scenarios
- In the actual development, the object of some of the properties or methods may only want to be used inside the object , while not wishing to be externally accessible to
- Private property is the object not want to expose properties
- Private method is an object does not wish to disclose the method
Defined way
- In the definition of the properties or methods , the former property name or method name to increase two underscores , is the definition of private property or method
Women class:
DEF __init __ (Self, name):
self.name name =
# Do not ask girls ages
Self .__ Age = 18
DEF __secret (Self):
Print ( "my age is d%"% Self .__ Age)
xiaofang = Women ( "Xiao Fang")
# private property, can not directly access external
# Print (xiaofang .__ Age)
# private methods, external can not directly call
# xiaofang .__ secret ()
02. The method of pseudo-private attributes and private (science)
Tip: In the daily development, do not use this way , access to the object of private property or private method
Python , There is no real sense of private
- Giving properties , methods naming, is the actual name to do some special treatment, so that the outside world can not have access to
- Treatment : in the name preceded
_类名=>_类名__名称
# Private property, can not directly access to external Print (xiaofang._Women__age) # private methods, external can not directly call xiaofang._Women__secret ()