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The next part, which I'll be working on, is encapsulation.

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Now supposing we have our square smiley and then yeah, we have happy that side.

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We put this to see it around this you see how the hand area turns at 64 because we've modified a side

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to it.

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But many times we don't want this kind of direct modification of class attributes externally.

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So what we could do is we could make this attribute private.

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And to do that, we could add this double underscore before the variable name.

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So that will make this private modify it whereby it's to be used again.

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We have that around now we see from this that even after modifying this site, we will have the same

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value for the area.

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And that's because this side is taking the default value, which is this five here.

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And so external modifications are now allowed.

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And if we want to make this kind of external modifications, we could use a setter by setter would mean

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we could have would define this set side function.

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Which modifies the value of the site internally.

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So we don't have to modify this site value externally, but now internally.

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So yeah, we have this, it'll take this site, I will pass and you know, set the site.

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Obviously we have the self that's an object class, it's an object method.

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So we have that.

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We have the site we can now modify.

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Let's run this again, see that.

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Now what we do now is we have happy that said side and run it and you see that it's modified.

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So this is how we go about encapsulating.