Re: [Tutor] Trivia
Just some programming philosophy. On Fri, Jun 24, 2011 at 3:58 AM, Vincent Balmori wrote: > > "Your whole approach is very fragile in this respect, it only > takes one small mistake in the data to wreck your program,. > Somethjing like a config file format would be much more > robust (and readable) the config reader module would make > sure you got what you expected back. " > > Can you please explain more on what you mean by this? > > > Alan Gauld wrote: > > > > > > "Vincent Balmori" wrote > > > >> It's working fine now with the scoring, but now at the end of the > >> program > >> for some reason I get this error message: > >> > > > "/Users/vincentbalmori/Desktop/Python/py3e_source/chapter07/trivia_challenge2.py", > >> line 27, in next_block > >>point = int(next_line(the_file)) > >> ValueError: invalid literal for int() with base 10: '' > > > > Thats because after the last question you try to read another > > block and don't check anywhere whether you actually read > > anything. Your next_block code just assumes there will > > always be valid data there, but at the end of the file there > > won't be. You get away with category being blank > > because replace() doesn't complain. But int() does. > > > > Your whole approach is very fragile in this respect, it only > > takes one small mistake in the data to wreck your program,. > > Somethjing like a config file format would be much more > > robust (and readable) the config reader module would make > > sure you got what you expected back. > > > > HTH, > > > > > > -- > > Alan Gauld > > Author of the Learn to Program web site > > http://www.alan-g.me.uk/ > > > > > > ___ > > Tutor maillist - Tutor@python.org > > To unsubscribe or change subscription options: > > http://mail.python.org/mailman/listinfo/tutor > > > > > > -- > View this message in context: > http://old.nabble.com/Trivia-tp31917610p31917979.html > Sent from the Python - tutor mailing list archive at Nabble.com. > > ___ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor > ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Trivia
"Vincent Balmori" wrote Can you please explain more on what you mean by this? "Your whole approach is very fragile in this respect, it only takes one small mistake in the data to wreck your program,. Your program relies on your data being exactly right. It only takes one missed newline, or one extra newline or a blank line or an extra question (maybe a cut n paste error when editing) or whatever to completely mess your program. > Somethjing like a config file format would be much more > robust (and readable) the config reader module would make > sure you got what you expected back. " Read the ConfigParser module documentation to see what I mean. It treats your data like a Windows INI file and you can retrieve values using section/tag values. So in your case You could do, in pseudo code: cp = ConfigParser(filename) for section in cp.getSections(): question = cp.get(section, "question") points = int( cp.getsection,"points") ) q1 = cp.get(section,"q1") q2 = cp.get(section,"q2") etc And you can catch exceptions raised to detect errors. That way, if a value doesn't exist you find out about it and the parser handles all the navigation of the file. You could also use an XML format (or JSON or) but Config Parser would be adequate for your needs. The data file would also be easier to read because the tags would make it clear: [Section Title] tag=value Becomes, for example: [On the Run With a Mammal] points=1 question=Let's say you turn state's evidence and need to "get on the lamb." If you wait /too long, what will happen? q1=You'll end up on the sheep q2=You'll end up on the cow q3=You'll end up on the goat q4=You'll end up on the emu answer=1 explantion=A lamb is just a young sheep.[The Godfather Will Get Down With You Now]...HTH,-- Alan GauldAuthor of the Learn to Program web sitehttp://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Trivia
"Your whole approach is very fragile in this respect, it only takes one small mistake in the data to wreck your program,. Somethjing like a config file format would be much more robust (and readable) the config reader module would make sure you got what you expected back. " Can you please explain more on what you mean by this? Alan Gauld wrote: > > > "Vincent Balmori" wrote > >> It's working fine now with the scoring, but now at the end of the >> program >> for some reason I get this error message: >> > "/Users/vincentbalmori/Desktop/Python/py3e_source/chapter07/trivia_challenge2.py", >> line 27, in next_block >>point = int(next_line(the_file)) >> ValueError: invalid literal for int() with base 10: '' > > Thats because after the last question you try to read another > block and don't check anywhere whether you actually read > anything. Your next_block code just assumes there will > always be valid data there, but at the end of the file there > won't be. You get away with category being blank > because replace() doesn't complain. But int() does. > > Your whole approach is very fragile in this respect, it only > takes one small mistake in the data to wreck your program,. > Somethjing like a config file format would be much more > robust (and readable) the config reader module would make > sure you got what you expected back. > > HTH, > > > -- > Alan Gauld > Author of the Learn to Program web site > http://www.alan-g.me.uk/ > > > ___ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor > > -- View this message in context: http://old.nabble.com/Trivia-tp31917610p31917979.html Sent from the Python - tutor mailing list archive at Nabble.com. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Trivia
"Vincent Balmori" wrote It's working fine now with the scoring, but now at the end of the program for some reason I get this error message: "/Users/vincentbalmori/Desktop/Python/py3e_source/chapter07/trivia_challenge2.py", line 27, in next_block point = int(next_line(the_file)) ValueError: invalid literal for int() with base 10: '' Thats because after the last question you try to read another block and don't check anywhere whether you actually read anything. Your next_block code just assumes there will always be valid data there, but at the end of the file there won't be. You get away with category being blank because replace() doesn't complain. But int() does. Your whole approach is very fragile in this respect, it only takes one small mistake in the data to wreck your program,. Somethjing like a config file format would be much more robust (and readable) the config reader module would make sure you got what you expected back. HTH, -- Alan Gauld Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Trivia
On Fri, Jun 24, 2011 at 8:56 AM, Vincent Balmori wrote: > > << > point = int(next_line(the_file)) > > If x is a string that can be interpreted as an integer number, int(x) is > that integer number; if the string is not the representation of an integer, > this will lead to a ValueError. > > -- > André Engels, andreeng...@gmail.com>>> > > > It's working fine now with the scoring, but now at the end of the program > for some reason I get this error message: > > Traceback (most recent call last): > File > > "/Users/vincentbalmori/Desktop/Python/py3e_source/chapter07/trivia_challenge2.py", > line 83, in >main() > File > > "/Users/vincentbalmori/Desktop/Python/py3e_source/chapter07/trivia_challenge2.py", > line 76, in main >category, point, question, answers, correct, explanation = > next_block(trivia_file) > File > > "/Users/vincentbalmori/Desktop/Python/py3e_source/chapter07/trivia_challenge2.py", > line 27, in next_block > point = int(next_line(the_file)) > ValueError: invalid literal for int() with base 10: '' > > The important thing in such a case is reading the error message and the last line in the error trace. In this case the error message is: ValueError: invalid literal for int() with base 10: '' This means that the int() function is being called with something that is not an integer - it even says what that something is, namely '' - that is, the empty string. Apparently at some time you come to the line point = int(next_line(the_file)) when next_line(the_file) is the empty string. -- André Engels, andreeng...@gmail.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Trivia
<<>> It's working fine now with the scoring, but now at the end of the program for some reason I get this error message: Traceback (most recent call last): File "/Users/vincentbalmori/Desktop/Python/py3e_source/chapter07/trivia_challenge2.py", line 83, in main() File "/Users/vincentbalmori/Desktop/Python/py3e_source/chapter07/trivia_challenge2.py", line 76, in main category, point, question, answers, correct, explanation = next_block(trivia_file) File "/Users/vincentbalmori/Desktop/Python/py3e_source/chapter07/trivia_challenge2.py", line 27, in next_block point = int(next_line(the_file)) ValueError: invalid literal for int() with base 10: '' -- View this message in context: http://old.nabble.com/Trivia-tp31917610p31917701.html Sent from the Python - tutor mailing list archive at Nabble.com. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Trivia
***ignore the "point = point" line in the next_block() function. -- View this message in context: http://old.nabble.com/Trivia-tp31917610p31917637.html Sent from the Python - tutor mailing list archive at Nabble.com. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Trivia
I have to improve the trivia_challenge program so each question has a different point value. I added a point into the text file after each category line, so the next_block() can call it. Whenever the program calculates the 'score = point' in main() it comes up with "TypeError: unsupported operand type(s) for +=: 'int' and 'str' " The problem is I am having trouble changing "point = next_line(the_file)" in the next_block() to be an int type. http://old.nabble.com/file/p31917610/trivia_challenge2.py trivia_challenge2.py http://old.nabble.com/file/p31917610/trivia.txt trivia.txt -- View this message in context: http://old.nabble.com/Trivia-tp31917610p31917610.html Sent from the Python - tutor mailing list archive at Nabble.com. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Trivia program.
Or
name = raw_input("Hi. What's your name? ")
called = "%s " % name
On Wed, 16 Feb 2005 11:46:09 +0100, Pierre Barbier de Reuille
<[EMAIL PROTECTED]> wrote:
> Mmmhh ... one very simple way would be to replace your first line by :
>
> name = raw_input("Hi. What's your name? ") + " "
>
> But if you want to keep the name as it is, I bet the best way is to
> replace your second line by :
>
> called = " ".join([ name for i in xrange(5) ])
>
> The advantage of this second method is the " " is added only *between*
> the names, and not after ...
>
> Pierre
>
> . Sm0kin'_Bull a écrit :
> > Hi, I got a problem with this program.
> >
> >
> > name = raw_input("Hi. What's your name? ")
> > called = name * 5
> > print "\nIf a small child were trying to get your attention, " \
> >"your name would become:"
> > print called
> > When i input the name like "John Goodman"
> >
> > it prints like...
> >
> > John GoodmanJohn GoodmanJohn GoodmanJohn GoodmanJohn Goodman
> >
> > But i want to print it like...
> >
> > John Goodman John Goodman John Goodman John Goodman John Goodman
> >
> > How can I do it?
> >
> >
> > Express yourself instantly with MSN Messenger! MSN Messenger
> > Download today it's FREE!
> >
> >
> >
> >
> > ___
> > Tutor maillist - Tutor@python.org
> > http://mail.python.org/mailman/listinfo/tutor
>
> --
> Pierre Barbier de Reuille
>
> INRA - UMR Cirad/Inra/Cnrs/Univ.MontpellierII AMAP
> Botanique et Bio-informatique de l'Architecture des Plantes
> TA40/PSII, Boulevard de la Lironde
> 34398 MONTPELLIER CEDEX 5, France
>
> tel : (33) 4 67 61 65 77fax : (33) 4 67 61 56 68
> ___
> Tutor maillist - Tutor@python.org
> http://mail.python.org/mailman/listinfo/tutor
>
--
'There is only one basic human right, and that is to do as you damn well please.
And with it comes the only basic human duty, to take the consequences.
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Re: [Tutor] Trivia program.
On Feb 16, 2005, at 10:26, . Sm0kin'_Bull wrote:
it prints like...
John GoodmanJohn GoodmanJohn GoodmanJohn GoodmanJohn Goodman
But i want to print it like...
John Goodman John Goodman John Goodman John Goodman John Goodman
How can I do it?
Try replacing the called = name * 5 line with:
if not name.endswith(' '):
called = ((name + ' ') * 5).strip()
else:
called = (name * 5).strip()
-- Max
maxnoel_fr at yahoo dot fr -- ICQ #85274019
"Look at you hacker... A pathetic creature of meat and bone, panting
and sweating as you run through my corridors... How can you challenge a
perfect, immortal machine?"
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Re: [Tutor] Trivia program.
Mmmhh ... one very simple way would be to replace your first line by :
name = raw_input("Hi. What's your name? ") + " "
But if you want to keep the name as it is, I bet the best way is to
replace your second line by :
called = " ".join([ name for i in xrange(5) ])
The advantage of this second method is the " " is added only *between*
the names, and not after ...
Pierre
. Sm0kin'_Bull a écrit :
Hi, I got a problem with this program.
name = raw_input("Hi. What's your name? ")
called = name * 5
print "\nIf a small child were trying to get your attention, " \
"your name would become:"
print called
When i input the name like "John Goodman"
it prints like...
John GoodmanJohn GoodmanJohn GoodmanJohn GoodmanJohn Goodman
But i want to print it like...
John Goodman John Goodman John Goodman John Goodman John Goodman
How can I do it?
Express yourself instantly with MSN Messenger! MSN Messenger
Download today it's FREE!
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
--
Pierre Barbier de Reuille
INRA - UMR Cirad/Inra/Cnrs/Univ.MontpellierII AMAP
Botanique et Bio-informatique de l'Architecture des Plantes
TA40/PSII, Boulevard de la Lironde
34398 MONTPELLIER CEDEX 5, France
tel : (33) 4 67 61 65 77fax : (33) 4 67 61 56 68
___
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[Tutor] Trivia program.
Hi, I got a problem with this program.
name = raw_input("Hi. What's your name? ")called = name * 5print "\nIf a small child were trying to get your attention, " \ "your name would become:"print called
When i input the name like "John Goodman"
it prints like...
John GoodmanJohn GoodmanJohn GoodmanJohn GoodmanJohn Goodman
But i want to print it like...
John Goodman John Goodman John Goodman John Goodman John Goodman
How can I do it?Express yourself instantly with MSN Messenger! MSN Messenger Download today it's FREE!
___
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