"fabian" wrote:
> how testing if a variable exists in python as isset in php??
try:
variable
except NameError:
print "variable not set"
but that is really lousy Python; better make sure you always assign to
all variables, and use None (or another suitable value) to mark that some
variable has no meaningful content right now.
that is, instead of
if condition:
variable = 1
...
try:
variable
except NameError:
....
write
variable = None
if condition:
variable = 1
...
if variable is None:
print "variable not set"
</F>
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