Python: Postgres module import failure

 Traceback (most recent call last):
File "", line 1, in 
import pg
File "C:\Python26\Lib\site-packages\pg.py", line 21, in -toplevel-
from _pg import *
ImportError: DLL load failed: The specified module could not be found.


Solution:
Make sure the PostgreSQL C interface (libpq.dll) is installed or
its directory (\Postgresql\bin) is on PATH.

Python trick - getattr

getattr is teh awesome. Using string concatenation, we can obtain a real method reference (which is an object in python), and call it!

import printhelper #defines various print methods named "print_"

def print(to_print, format=):
to_call = getattr(printhelper, "print_%s" % type, printhelper.print_text)
return to_call(to_print)