How to achieve a construction similar to clean_?

Hello,

I'm creating a tool that will automate the downloading, processing and
repackaging of data.

The scripting for each data set is composed of two main parts: a
fairly standard models.py file, and a loaders.py file that will
contain all the instructions on how to turn the raw data into what
gets saved. The plan is for the two to be linked: each loader object
will have a Meta class in which the corresponding model will be
declared.

With respect to the data processing, I already have defined a
process_data() method to handle general tasks. But I also want each
field in the model to have a process_<fieldname>() method (so, for
example, I can contain all processing related to field A to the
process_a() method. How would I go about this?

Given a model, I want to be able to create process_<fieldname>()
methods for each field. I know forms have a similar construction with
their clean_<fieldname>() methods. I've been looking at the relevant
parts of the Django source, but can't seem to find where those get
created. Can someone steer me in the right direction?

Thanks in advance.

~Allan

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