GiBo wrote:
> Hi!
>
> Classic situation - I have to process an input stream of unknown length
> until a I reach its end (EOF, End Of File). How do I check for EOF?
> [...]
> I'd better like something like:
>
> while not stream.eof():
> ...
Is there a reason why some classes distributed with Python 2.5 are not
new-style classes? For instance StringIO is apparently "old-style" class
i.e. not inherited from "object". Can I somehow turn an existing
old-style class to a new-style one? I tried for example:
class MyStreamIO(StreamIO, object):
pass
but got an error. Is my only chance taking StringIO.py from python tree,
adding "(object)" to the class declaration and distributing it with my
source?
FWIW I created a wrapper class that does what I need with the EOF
problem in quite elegant way, but due to __getattribute__() stuff it
only works with new-style classes :-(
class MyStreamer(object):
def __init__(self, stream):
self._stream = stream
self.eof = False
def read(self, amount = None):
data = self._stream.read(amount)
if len(data) == 0:
self.eof = True
raise EOFError
return data
def __getattribute__(self, attribute):
try:
return object.__getattribute__(self, attribute)
except AttributeError:
pass
return self._stream.__getattribute__(attribute)
GiBo
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