Klaus Neuner wrote:
Hello,
I am writing a program that analyzes files of different formats. I
would like to use a function for each format. Obviously, functions can
be mapped to file formats. E.g. like this:
if file.endswith('xyz'):
xyz(file)
elif file.endswith('abc'):
abc(file)
...
Yet, I would prefer to do something of the following kind:
func = file[-3:]
apply_func(func, file)
Can something of this kind be done in Python?
Klaus
You won't need anything else than defining the proper function to
support the extension with the following code:
import os
class Handlers:
class NoHandler(Exception):
pass
@staticmethod
def txt(fileName):
print 'I am processing a txt file'
@staticmethod
def tar(fileName):
print 'I am processing a tar file'
@classmethod
def default(cls, fileName):
raise cls.NoHandler("I don't know how to handle %s " % fileName)
for fileName in ['/tmp/test.txt', '/tmp/sdfsd.sfds']:
_, extension = os.path.splitext(fileName)
func = getattr(Handlers, extension.replace('.', ''), Handlers.default)
try:
func(fileName)
except Handlers.NoHandler, exc:
print exc
JM
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