I saw that there is a function with a strange name in Python, __init__. I know that the underlined function will run automatically, but I don’t know the specific meaning of its existence..
Today I saw >Chapter 11 Object-Oriented Programming, introduces it like this: "Notes to C++/Java/C# programmers
All class members (including data members) in Python are public , all methods are valid.
With one exception: if you use a data member name prefixed with a double underscore such as __privatevar, Python's name management system will effectively treat it as a private variable.
##There is a convention that if a variable is only used in a class or object, it should be prefixed with a single underscore. Other names will be regarded as public and can be used by other classes/objects. This is just a convention, not required by Python (unlike the double underscore prefix) Also, note that the __del__ method is similar to the concept of destructor "It suddenly dawned on me that __init_ _It is used as a constructor in a class, and it is written in a fixed way. It seems very rigid, but it actually makes sensedef __init__(self, name): '''Initializes the person's data.''' self.name = name print '(Initializing %s)' % self.name # When this person is created, he/she # adds to the population Person.population += 1The name variable belongs to the object (it uses self assignment), so it is a variable of the object
The value of self.name is specified on a per-object basis, indicating its nature as a variable of the object.
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