Joshua wrote:
TypeError: update() takes exactly 2 arguments (3 given)

I don't understand this, since I only gave update 2 arguments. If anyone could shed some light on this, I'd greatly appreciate it. Here's the code:

This is something fairly fundamental to Python programming, so you have to make sure that you understand how this works.


When you have a class with a method:

class Foo:
    def bar(self, x):
        print x

And you call that method on an instance of the class:

f = Foo()
f.bar("abc")

The instance, f, is automatically passed as the first argument to the function before any other arguments that are provided in the call. Therefore, when you declare methods in a class they must have a "self" parameter as the first parameter.

There's more to this than I've explained here so you should read a Python book or online manual.

Ciao,
Gordon

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