Use Caution When Accessing Class Attribute with Instance : Attribute « Class « Python Tutorial

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Python Tutorial » Class » Attribute 
11.2.6.Use Caution When Accessing Class Attribute with Instance
class Foo(object):
     x = 1.5

foo = Foo()
print foo.x
foo.x = 1.7          
print foo.x            
print Foo.x
11.2.Attribute
11.2.1.setattr and getattr
11.2.2.Attribute Reference
11.2.3.Modifying Class Attributes
11.2.4.Attributes are values associated with the object.
11.2.5.Instance Attributes versus Class Attributes
11.2.6.Use Caution When Accessing Class Attribute with Instance
11.2.7.Class Attributes More Persistent
11.2.8.Let us make our example more useful by giving P some attributes
11.2.9.Simple Attribute Lookup Example
11.2.10.hasattr(), getattr(), setattr(), delattr()
11.2.11.Class Employee with class attribute count.
11.2.12.Class that defines method __getattribute__ and __getattr__
11.2.13.Attach attributes to the class by assigning names to it outside of the original class
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