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From: "Frank Millman" <frank@chagford.com>
Subject: Re: what is the difference between name and _name?
Date: Wed, 20 Aug 2014 14:18:18 +0200
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"luofeiyu" <elearn2014@gmail.com> wrote in message 
news:53F48957.8020700@gmail.com...
> So in this example:
>>> class Person(object):
>>>       def __init__(self, name):
>>>           self._name = name
>>         [...]
>>>       name = property(getName, setName, delName, "name property docs")
>>
>>
>> (3) name is the public attribute that other classes or functions are
>> permitted to use.
>>
>>
>> problem 1:  there is no self.name =  something in the defination ,why i 
>> can get bob.name?
>>
>>

I also found it confusing at first, but reading the docs and trying out the 
examples at the interpreter prompt helped a lot.

Here is the relevant doc page -

    https://docs.python.org/3/library/functions.html#property

If you really want to know what goes on under the hood, Google turned up 
this in-depth explanation -

    http://stackoverflow.com/questions/17330160/how-does-the-property-decorator-work

HTH

Frank Millman