Oops, forgot my reply-to-all On Tue, Jun 30, 2009 at 2:20 PM, Wayne <sri...@gmail.com> wrote:
> On Tue, Jun 30, 2009 at 1:06 PM, Bob Rea <b...@telaugos.com> wrote: > >> <snip> >> If I input my own name and dob, it works: >> b...@gandalf:~/python/MakingUse/Chapter05> python code1.py >> Enter your first name: Bob >> Enter your last name: Rea >> Enter your date of birth, mm-dd-yyyy: 03-05-1943 >> You can chose one of the following login names: >> 1. BobR >> 2. BobR53 >> 3. RBob43 >> 4. BRea66 >> >> If I use the data listed in the book, it fails: >> b...@gandalf:~/python/MakingUse/Chapter05> python code1.py >> Enter your first name: Laura >> Enter your last name: Jones >> Enter your date of birth, mm-dd-yyyy: 12-24-1980 >> You can chose one of the following login names: >> 1. LauraJ >> 2. LauraJ2412 >> 3. JLaura80 >> Traceback (most recent call last): >> File "code1.py", line 67, in ? >> fourth=fname[0]+lname+ age_func() >> TypeError: cannot concatenate 'str' and 'NoneType' objects >> >> What is going on here? >> > > Well the first line after "Traceback" give you the line of code and the > filename. Which happens to be code1.py line 67. > > TypeError is the type of error - specifically you tried to do something > with incompatible types. In this case, adding together a string and > NoneType. > > I'll do a little digging, but my guess is you have a problem with your > age_func() not returning any value. > > HTH, > Wayne > I was correct:def age_func(): age=cur_year-year-1 if month<cur_month or (month==cur_month and day<cur_day): age=age+1 return str(age) What happens if month is > cur_month AND it's not my birthday? You don't return a value. But if you simply unindent the "return" value then it should fix it: def age_func(): age=cur_year-year-1 if month<cur_month or (month==cur_month and day<cur_day): age=age+1 return str(age) Now regardless of whether age is incremented, it will return a string. HTH, Wayne -- To be considered stupid and to be told so is more painful than being called gluttonous, mendacious, violent, lascivious, lazy, cowardly: every weakness, every vice, has found its defenders, its rhetoric, its ennoblement and exaltation, but stupidity hasn’t. - Primo Levi
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