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    <p>Your question is really rather broad as classes and instances/objects are vital parts of object-oriented programming, so this is not really Python specific. I recommend you buy some books on this as, while initially basic, it can get pretty in-depth. <a href="http://en.wikipedia.org/wiki/Class-based_programming" rel="nofollow noreferrer">In essense</a>, however:</p> <blockquote> <p>The most popular and developed model of OOP is a class-based model, as opposed to an object-based model. In this model, objects are entities that combine state (i.e., data), behavior (i.e., procedures, or methods) and identity (unique existence among all other objects). The structure and behavior of an object are defined by a class, which is a definition, or blueprint, of all objects of a specific type. An object must be explicitly created based on a class and an object thus created is considered to be an instance of that class. An object is similar to a structure, with the addition of method pointers, member access control, and an implicit data member which locates instances of the class (i.e. actual objects of that class) in the class hierarchy (essential for runtime inheritance features).</p> </blockquote> <p>So you would, for example, define a <code>Dog</code> class, and create instances of particular dogs:</p> <pre><code>&gt;&gt;&gt; class Dog(): ... def __init__(self, name, breed): ... self.name = name ... self.breed = breed ... def talk(self): ... print "Hi, my name is " + self.name + ", I am a " + self.breed ... &gt;&gt;&gt; skip = Dog('Skip','Bulldog') &gt;&gt;&gt; spot = Dog('Spot','Dalmatian') &gt;&gt;&gt; spot.talk() Hi, my name is Spot, I am a Dalmatian &gt;&gt;&gt; skip.talk() Hi, my name is Skip, I am a Bulldog </code></pre> <p>While this example is silly, you can then start seeing how you might define a <code>Client</code> class that sets a blueprint for what a Client is, has methods to perform actions on a particular client, then manipulate a particular <em>instance</em> of a client by creating an object and calling these methods in that context.</p> <p>Sometimes, however, you have methods of a class that don't really make sense being accessed through an instance of the class, but more from the class itself. These are known as <a href="http://docs.python.org/library/functions.html#staticmethod" rel="nofollow noreferrer">static methods</a>. </p>
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    1. PONeed help with the class and instance concept in Python
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    1. USPaolo Bergantino
    1. USPaolo Bergantino
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    1. COSo basicly you define a "class" and then associate objetcs with it (wich combine state, behavior and methods) ? For example if i want to manipulate images that I upload to a site, first I create a class Images inside a module, like image.py, then inside it I create all objects that will manipulate the images?
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      1. USFabio
    2. COinside it you create all _methods_ that manipulate the image. The objects would be the specific images you want to do something with. So after you define your class and your methods, you might do: foo = Image('/home/me/whatever.jpg') foo.resize(500) - you would then be acting on the particular instance of the image you instantiated.
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      1. USPaolo Bergantino
    3. CONow im starting to understanding it. So instead of creating several functions around (in some loose way) I can create, instead, a class and then several methods associate with it so i can do everything i want to it inside that class (on its methods)?
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