Distributing methods of a class across multiple files

Frank Millman frank at chagford.com
Wed Jan 25 03:26:04 EST 2012

"lh" <lhughes42 at gmail.com> wrote:
> Is this possible please?  I have done some searching but it is hard to
> narrow down Google searches to this question. What I would like to do
> is, for example:
> 1) define a class Foo in file test.py... give it some methods
> 2) define a file test2.py which contains a set of methods that are
> methods of class Foo defined in test.py.  I can import Foo obviously
> but it isn't clear to me how to identify the methods in test2.py to be
> methods of class Foo defined in test.py (normally I would just indent
> them "def"'s under the class but the class isn't textually in
> test2.py).
> In short I would like to distribute code for one class across multiple
> files so a given file doesn't get ridiculously long.

I take the point of the other responders that it is not a normal thing to 
do, but I had a few long but rarely used methods which I wanted to move out 
of the main file just to keep the main file tidier. I came up with this 
solution, and it seems to work.

In test2.py -

    def long_method_1():

    def long_method2():

In test.py -

    import test2

    class Foo:
        long_method_1 = test2.long_method_1
        long_method_2 = test2.long_method_2

Then in Foo I can refer to self.long_method_1().


Frank Millman

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