[print >>] None
Erik Max Francis
max at alcyone.com
Tue Oct 23 20:15:10 CEST 2001
Larry Whitley wrote:
> def output(self, fout):
> print >>fout, self.thing1, self.thing2, self.thing3
> In the calling program I say:
> object.output( fout ) # print to file
> object.output( None) # print to standard output
> But Python complains that None is a variable that has not been
> set. Can someone explain? I thought None was the empty object
> Where have I gone astray?
It's not clear to me why you expected this work. print >> None is not
the same as plain old print. print >> x requires an (output) file
object, and None isn't one.
Simply check the value of None before you start and set it to stdout if
def output(self, file = None):
if file is None:
file = sys.stdout
print >> file, ...
Erik Max Francis / max at alcyone.com / http://www.alcyone.com/max/
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