Re: [Tutor] Checking for custom error codes
"wormwood_3" <[EMAIL PROTECTED]> wrote >def lookup(self): > ... >for potdomain in self.potdomains: >try: >who.whois(potdomain) >self.availdomains.append(potdomain) >except 'NoSuchDomain': >pass > This may, however, be something else wrong with my code, or the > rwhois module, not the try, except check. You couldcheck that the except is working by replacing the pass statement with a print statement. If the print statement shows up you know the except worked so you can put the pass back in. HTH, -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Checking for custom error codes
> This is exactly what I needed, awesome! Looks like this is what you were > saying to do?: > http://docs.python.org/tut/node10.html#SECTION001050 Why ~ exactly! A link tells a thousand words. (Or maybe more.) So does that mean that a link is inherently more valuable than a picture? ;-) JS ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Checking for custom error codes
> Traceback (most recent call last): > File "domainspotter.py", line 150, in >runMainParser() > File "domainspotter.py", line 147, in runMainParser >td.run() > File "domainspotter.py", line 71, in run >checkdomains.lookup() > File "domainspotter.py", line 108, in lookup >from rwhois import WhoisRecord, NoSuchDomain > ImportError: cannot import name NoSuchDomain > > Maybe I need to import something else to be able to throw it. > > I think if someone can explain a more general form of this I would be on > better footing: To use a custom error code (from a module) in a loop or > anywhere else, do I need to import the code itself? I had assumed that > once I imported the module that defined the error code, I could catch it > just like a core Python error code. >>The problem is evident. The name NoSuchDomain is not defined. It is not a >>variable. It is just a string. When you call an error like this raise >>'NoSuchDomain', it's called something - don't know what (string >>exception?) - but as you found out, that method of raising errors is now >>frowned upon (deprecated). The way you are supposed to raise errors is to >>create a new class, subclassing Exception. Then you would be able to catch >>it by variable name as you are trying to do with the import. This is exactly what I needed, awesome! Looks like this is what you were saying to do?: http://docs.python.org/tut/node10.html#SECTION001050 >>But you certainly can't import a constant string! It's like trying to import >>the >>contents of a string variable, instead of the variable itself. Again, the >>problem is deprecation, the rwhois will eventually have to be re-written so >>that it uses exception classes, instead of just raising string errors. That would seem best. I will see if they have this in the works. Thanks again! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Checking for custom error codes
> Traceback (most recent call last): > File "domainspotter.py", line 150, in >runMainParser() > File "domainspotter.py", line 147, in runMainParser >td.run() > File "domainspotter.py", line 71, in run >checkdomains.lookup() > File "domainspotter.py", line 108, in lookup >from rwhois import WhoisRecord, NoSuchDomain > ImportError: cannot import name NoSuchDomain > > Maybe I need to import something else to be able to throw it. > > I think if someone can explain a more general form of this I would be on > better footing: To use a custom error code (from a module) in a loop or > anywhere else, do I need to import the code itself? I had assumed that > once I imported the module that defined the error code, I could catch it > just like a core Python error code. The problem is evident. The name NoSuchDomain is not defined. It is not a variable. It is just a string. When you call an error like this raise 'NoSuchDomain', it's called something - don't know what (string exception?) - but as you found out, that method of raising errors is now frowned upon (deprecated). The way you are supposed to raise errors is to create a new class, subclassing Exception. Then you would be able to catch it by variable name as you are trying to do with the import. But you certainly can't import a constant string! It's like trying to import the contents of a string variable, instead of the variable itself. Again, the problem is deprecation, the rwhois will eventually have to be re-written so that it uses exception classes, instead of just raising string errors. JS ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Checking for custom error codes
>>Probably you need to import NoSuchDomain from rwhois: >>from rwhois import WhoisRecord, NoSuchDomain >> >>then use >> except NoSuchDomain: I tried adding: from rwhois import WhoisRecord, NoSuchDomain who = WhoisRecord() self.totalchecked = 0 self.availdomains = [] for potdomain in self.potdomains: try: who.whois(potdomain) self.availdomains.append(potdomain) except NoSuchDomain: pass self.totalchecked+=1 But I get back: Traceback (most recent call last): File "domainspotter.py", line 150, in runMainParser() File "domainspotter.py", line 147, in runMainParser td.run() File "domainspotter.py", line 71, in run checkdomains.lookup() File "domainspotter.py", line 108, in lookup from rwhois import WhoisRecord, NoSuchDomain ImportError: cannot import name NoSuchDomain Maybe I need to import something else to be able to throw it. I think if someone can explain a more general form of this I would be on better footing: To use a custom error code (from a module) in a loop or anywhere else, do I need to import the code itself? I had assumed that once I imported the module that defined the error code, I could catch it just like a core Python error code. >>In general, when you ask a question here, "I tried X and it did not >>work" is not very informative and makes it difficult to give a good >>answer. It is very helpful to show the actual code you tried and the >>actual error message, including the full traceback. The error message >>and traceback include a lot of very helpful information; including them >>will greatly improve your chance of a correct answer. Commented on this with the warning text in last response. Will endeavour to do better:-) ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Checking for custom error codes
>>Examining rwhois.py reveals >>raise 'NoSuchDomain' >>>which is a string exception. Which should work even tho deprecated. >>>When you say it did not work what is the evidence? -- Bob Gailer 510-978-4454 Oakland, CA 919-636-4239 Chapel Hill, NC ___ I did speak too soon on this. When I run the script using the code at the end, I get: rwhois.py:327: DeprecationWarning: raising a string exception is deprecated raise 'NoSuchDomain', self.domain === def lookup(self): """ Looks up each word in our list with whois """ """ Using rwhois, which is either broken or lacks most data: """ from rwhois import WhoisRecord who = WhoisRecord() self.totalchecked = 0 self.availdomains = [] for potdomain in self.potdomains: try: who.whois(potdomain) self.availdomains.append(potdomain) except 'NoSuchDomain': pass self.totalchecked+=1 def printresults(self): """ Prints the ones that do not seem to be taken, with some stats. """ print "Results are in! " print "%s total words checked, as .com and .net domains." % (self.totalchecked / 2) print "--" print "Domains that seem to be available: \n" for availdomain in self.availdomains: print availdomain print "\n" print "--" Then, I get back items in the list such as: Domains that seem to be available: AA.com AARP.com AARP.net I confirmed in spotchecking that some of these are taken, such as with whois -H AARP.com: Domain Name: AARP.COM Registrar: NETWORK SOLUTIONS, LLC. Whois Server: whois.networksolutions.com This may, however, be something else wrong with my code, or the rwhois module, not the try, except check. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Checking for custom error codes
"wormwood_3" <[EMAIL PROTECTED]> wrote > Recently I was trying to do a "try: X except Y: Z" statement, > checking for a custom error code >for potdomain in self.potdomains: >try: >who.whois(potdomain) >self.availdomains.append(potdomain) >except 'NoSuchDomain': >pass >self.totalchecked+=1 > > got a warning that throwing a string exception is deprecated, > but the check did not work anyway. So what did happen? Your code simply ignores the error so, for it not to work, I assume you are still getting an error report and traceback? If so what does it say? Python error messages may look arcane to start with but they usually contain enough information to identify a problem without any further debugging - but only if we can see them! :-) HTH, -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Checking for custom error codes
>>Probably you need to import NoSuchDomain from rwhois: >>from rwhois import WhoisRecord, NoSuchDomain >> >>then use >> except NoSuchDomain: That sounds right, I will give it a shot soon. >>In general, when you ask a question here, "I tried X and it did not >>work" is not very informative and makes it difficult to give a good >>answer. It is very helpful to show the actual code you tried and the >>actual error message, including the full traceback. The error message >>and traceback include a lot of very helpful information; including them >>will greatly improve your chance of a correct answer. Sorry about that, I knew the code would be helpful, that's why I linked to my blog post that included the full code. I will post the traceback tonight when I can run it. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Checking for custom error codes
wormwood_3 wrote: > Hi all, > > I am new to Python programming and this list, looks like a great place so far! > > Recently I was trying to do a "try: X except Y: Z" statement, checking for a > custom error code that the rwhois.py module throws. Some details on the > exercise and the full code can be found on this post ( > http://assistedsilicon.blogspot.com/2007/08/fun-with-python-domainspotter.html > ). So, here is what I tried: > > for potdomain in self.potdomains: > try: > who.whois(potdomain) > self.availdomains.append(potdomain) > except 'NoSuchDomain': > pass > self.totalchecked+=1 > > If you need more context, the whole program is here ( > http://assistedsilicon.blogspot.com/2007/08/fun-with-python-domainspotter.html#code > ). I first tried simply "except NoSuchDomain", since that was what I saw > rwhois throw when I sent it a domain that was not registered. That did not > work, so I quoted it. I got a warning that throwing a string exception is > deprecated, but the check did not work anyway. Am I trying to check for this > custom error wrongly? How should it be done? > Examining rwhois.py reveals raise 'NoSuchDomain' which is a string exception. Which should work even tho deprecated. When you say it did not work what is the evidence? > > -- Bob Gailer 510-978-4454 Oakland, CA 919-636-4239 Chapel Hill, NC ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Checking for custom error codes
wormwood_3 wrote: > Hi all, > > I am new to Python programming and this list, looks like a great place so far! > > Recently I was trying to do a "try: X except Y: Z" statement, checking for a > custom error code that the rwhois.py module throws. Some details on the > exercise and the full code can be found on this post ( > http://assistedsilicon.blogspot.com/2007/08/fun-with-python-domainspotter.html > ). So, here is what I tried: > > for potdomain in self.potdomains: > try: > who.whois(potdomain) > self.availdomains.append(potdomain) > except 'NoSuchDomain': > pass > self.totalchecked+=1 > > If you need more context, the whole program is here ( http://assistedsilicon.blogspot.com/2007/08/fun-with-python-domainspotter.html#code ). I first tried simply "except NoSuchDomain", since that was what I saw rwhois throw when I sent it a domain that was not registered. That did not work, so I quoted it. I got a warning that throwing a string exception is deprecated, but the check did not work anyway. Am I trying to check for this custom error wrongly? How should it be done? Probably you need to import NoSuchDomain from rwhois: from rwhois import WhoisRecord, NoSuchDomain then use except NoSuchDomain: In general, when you ask a question here, "I tried X and it did not work" is not very informative and makes it difficult to give a good answer. It is very helpful to show the actual code you tried and the actual error message, including the full traceback. The error message and traceback include a lot of very helpful information; including them will greatly improve your chance of a correct answer. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Checking for custom error codes
Hi all, I am new to Python programming and this list, looks like a great place so far! Recently I was trying to do a "try: X except Y: Z" statement, checking for a custom error code that the rwhois.py module throws. Some details on the exercise and the full code can be found on this post ( http://assistedsilicon.blogspot.com/2007/08/fun-with-python-domainspotter.html ). So, here is what I tried: for potdomain in self.potdomains: try: who.whois(potdomain) self.availdomains.append(potdomain) except 'NoSuchDomain': pass self.totalchecked+=1 If you need more context, the whole program is here ( http://assistedsilicon.blogspot.com/2007/08/fun-with-python-domainspotter.html#code ). I first tried simply "except NoSuchDomain", since that was what I saw rwhois throw when I sent it a domain that was not registered. That did not work, so I quoted it. I got a warning that throwing a string exception is deprecated, but the check did not work anyway. Am I trying to check for this custom error wrongly? How should it be done? Thanks for any assistance! -Sam ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Checking for custom error codes
Hi all, I am new to Python programming and this list, looks like a great place so far! Recently I was trying to do a "try: X except Y: Z" statement, checking for a custom error code that the rwhois.py module throws. Some details on the exercise and the full code can be found on this post ( http://assistedsilicon.blogspot.com/2007/08/fun-with-python-domainspotter.html ). So, here is what I tried: for potdomain in self.potdomains: try: who.whois(potdomain) self.availdomains.append(potdomain) except 'NoSuchDomain': pass self.totalchecked+=1 If you need more context, the whole program is here ( http://assistedsilicon.blogspot.com/2007/08/fun-with-python-domainspotter.html#code ). I first tried simply "except NoSuchDomain", since that was what I saw rwhois throw when I sent it a domain that was not registered. That did not work, so I quoted it. I got a warning that throwing a string exception is deprecated, but the check did not work anyway. Am I trying to check for this custom error wrongly? How should it be done? Thanks for any assistance! -Sam ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
