spir wrote:
Lie Ryan dixit:
class Error(Exception):
def __init__(self, value):
self.value = value
def printer(self, value):
print self.value
You can also use __str__ instead of printer. This will give a standard output
form for your error automatically used by print and also, for exceptions, when
python writes it to stderr: you don't need to catch the error to write it
yourself.
def __str_(self, value):
print self.value
The __str__() method needs to return a string, not print it. And it
doesn't take a "value" argument. I think you want (untested):
def __str__(self):
return self.value
So that a test case may be (untested):
def oops():
raise Error('some error')
def domoed(catch_error_and_go_on = False):
if catch_error_and_go_on:
try:
oops()
except Error, e:
print e # just for feedback
else:
print 'no error'
else:
oops() # will print error
if __name__ == "__main__":
print "=== case error uncatched"
domoed()
print "\n=== case error catched"
domoed(true)
Denis
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