I have a really hard time understanding where methods are defined in
python classes. My first contact with programming was with C++ and Java
and even if I was messing with them in a very amateurish level, I could
find where each class was defined and what methods were defined inside
them. Everything was clear and comprehensive. With python everything
looks like magic. Methods and properties appearing out of nowhere and
somehow easing the task at hand. I am not complaining for their
existence but I really can't understand how and what is defined so I can
use it.
Enough ranting and let me give an example of what I mean.
Let's have a look at the pygeocoder library located here:
http://code.xster.net/pygeocoder/src/8888c863f907f8a706545fa9b27959595f45f8c5/pygeolib.py?at=default
and a short tutorial on usage by someone unrelated to the author located
here:
http://www.pixelite.co.nz/article/validate-and-clean-user-submitted-address-data-pygeocoder?&ei=518KU5mcFeim4ASG34Fo?&usg=AFQjCNFgMx8s7wPP6R6CyLLoSAE-Ohh51Q?&sig2=afBUF9yuxbZYB9fcfK9Lmw?&bvm=bv.61725948,d.bGE
The tutorial basicaly says in code that once we obtain the data we can do:
print "address.valid_address: ", address.valid_address
print "address.street_number: ", address.street_number
print "address.route: ", address.route
print "address.sublocality: ", address.sublocality
print "address.locality: ", address.locality
print "address.administrative_area_level_1: ",
address.administrative_area_level_1
print "address.country: ", address.country
print "address.postal_code: ", address.postal_code
print "address.coordinates: ", address.coordinates
print "address.formatted_address: ", address.formatted_address
Some properties I can see them defined but some others like sublocality
or administrative_area_level_1 I don't see them defined anywhere. Also
in the comments in the source code the author says
#You can also choose a different property to display for each lookup #type.
# Example:
# result.country__short_name
but I can't understand where that __short_name comes from
I hope I didn't bore you with this long text but this is really
confusing for me and I hope someone can help me understand these things.
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