[EMAIL PROTECTED] wrote:
> Hi there,
>
> I have a 28mb XML file which I parse with SAX. I have some processing
> to do in the startElement / endElement callbacks, which slows the
> parsing down to about 60 seconds on my machine.
>
> My application is unresponsive for this time, so I would like to show
> a progress bar. I could show a spinner to show that the application is
> responsive, but I would prefer to show a percentage. Is there any way
> to query the parser to see how many bytes of the input file have been
> processed so far?
I'd create a file-like object that does this for you. It should wrap the
original file, and count the number of bytes delivered. Something along
these lines (untested!!!):
class PercentageFile(object):
def __init__(self, filename):
self.size = os.stat(filename)[6]
self.delivered = 0
self.f = file(filename)
def read(self, size=None):
if size is None:
self.delivered = self.size
return self.f.read()
data = self.f.read(size)
self.delivered += len(data)
return data
@property
def percentage(self):
return float(self.delivered) / self.size * 100.0
Diez
--
http://mail.python.org/mailman/listinfo/python-list
