[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
***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
Re: [Tutor] Trivia
try: 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 module 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
On Fri, Jun 24, 2011 at 8:56 AM, Vincent Balmori vincentbalm...@yahoo.comwrote: try: 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 module 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
Vincent Balmori vincentbalm...@yahoo.com 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
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 vincentbalm...@yahoo.com 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 vincentbalm...@yahoo.com 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] set the BETWEEN range in the SQL query using the python datetime function
Norman Khine wrote:
hello, i have this code http://pastie.org/2112997
but i am not sure how to make the date range so that i get a list
based on the daily totals not the results i am now getting:
(2L, Decimal('173.958344'), Decimal('159.966349')) 2011-06-23 00:00:00
2011-06-23 23:59:59
(2L, Decimal('173.958344'), Decimal('159.966349')) 2011-06-22 00:00:00
2011-06-23 23:59:59
What should the result look like? Can you give a simplified example with
input and output data?
the problem is that i am unsure how best to set the BETWEEN range in
the SQL query using the python datetime function.
My guess is that you can move more of the problem from Python into SQL if
you add a GROUP BY clause.
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Re: [Tutor] set the BETWEEN range in the SQL query using the python datetime function
thank you, it was simpler than what i was trying to do, here is the
revised version:
http://pastie.org/2115586
one thing i am getting an error is on like 103, in that if, i change
(http://pastie.org/2115615):
-plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - GBP',
'Commission - %s GBP' % (total_commission)),
+plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - %s GBP',
'Commission - %s GBP' % (total_adwords, total_commission)),
'upper right', shadow=True)
i get the following traceback:
Traceback (most recent call last):
File commission.py, line 119, in module
plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - %s
GBP', 'Commission - %s GBP' % (total_adwords, total_commission)),
TypeError: not all arguments converted during string formatting
what am i missing?
thanks
norman
On Fri, Jun 24, 2011 at 12:18 PM, Peter Otten __pete...@web.de wrote:
Norman Khine wrote:
hello, i have this code http://pastie.org/2112997
but i am not sure how to make the date range so that i get a list
based on the daily totals not the results i am now getting:
(2L, Decimal('173.958344'), Decimal('159.966349')) 2011-06-23 00:00:00
2011-06-23 23:59:59
(2L, Decimal('173.958344'), Decimal('159.966349')) 2011-06-22 00:00:00
2011-06-23 23:59:59
What should the result look like? Can you give a simplified example with
input and output data?
the problem is that i am unsure how best to set the BETWEEN range in
the SQL query using the python datetime function.
My guess is that you can move more of the problem from Python into SQL if
you add a GROUP BY clause.
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--
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˙uʍop ǝpısdn p,uɹnʇ pןɹoʍ ǝɥʇ ǝǝs noʎ 'ʇuǝɯɐן sǝɯıʇ ǝɥʇ puɐ 'ʇuǝʇuoɔ
ǝq s,ʇǝן ʇǝʎ
% .join( [ {'*':'@','^':'.'}.get(c,None) or
chr(97+(ord(c)-83)%26) for c in ,adym,*)uzq^zqf ] )
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Re: [Tutor] set the BETWEEN range in the SQL query using the python datetime function
Norman Khine wrote:
thank you, it was simpler than what i was trying to do, here is the
revised version:
http://pastie.org/2115586
one thing i am getting an error is on like 103, in that if, i change
(http://pastie.org/2115615):
-plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - GBP',
'Commission - %s GBP' % (total_commission)),
+plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - %s GBP',
'Commission - %s GBP' % (total_adwords, total_commission)),
'upper right', shadow=True)
i get the following traceback:
Traceback (most recent call last):
File commission.py, line 119, in module
plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - %s
GBP', 'Commission - %s GBP' % (total_adwords, total_commission)),
TypeError: not all arguments converted during string formatting
what am i missing?
'Commission - %s GBP' % (total_adwords, total_commission))
Two items in the tuple but only one '%s' in the format string. You probably
wanted
... 'Google AdWords - %s GBP' % total_adwords, 'Commission - %s GBP' %
total_commission ...
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Re: [Tutor] set the BETWEEN range in the SQL query using the python datetime function
On 2011/06/24 01:19 PM, Norman Khine wrote:
thank you, it was simpler than what i was trying to do, here is the
revised version:
http://pastie.org/2115586
one thing i am getting an error is on like 103, in that if, i change
(http://pastie.org/2115615):
-plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - GBP',
'Commission - %s GBP' % (total_commission)),
+plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - %s GBP',
'Commission - %s GBP' % (total_adwords, total_commission)),
'upper right', shadow=True)
i get the following traceback:
Traceback (most recent call last):
File commission.py, line 119, inmodule
plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - %s
GBP', 'Commission - %s GBP' % (total_adwords, total_commission)),
TypeError: not all arguments converted during string formatting
what am i missing?
thanks
norman
You've got 'Google AdWords - %s GBP' with no arguments and 'Commission -
%s GBP' with 2 arguments.
--
Christian Witts
Python Developer
//
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Re: [Tutor] set the BETWEEN range in the SQL query using the python datetime function
On Fri, Jun 24, 2011 at 1:31 PM, Christian Witts cwi...@compuscan.co.za wrote:
On 2011/06/24 01:19 PM, Norman Khine wrote:
thank you, it was simpler than what i was trying to do, here is the
revised version:
http://pastie.org/2115586
one thing i am getting an error is on like 103, in that if, i change
(http://pastie.org/2115615):
-plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - GBP',
'Commission - %s GBP' % (total_commission)),
+plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - %s GBP',
'Commission - %s GBP' % (total_adwords, total_commission)),
'upper right', shadow=True)
i get the following traceback:
Traceback (most recent call last):
File commission.py, line 119, in module
plt.legend(('Income - GBP', 'Discounts', 'Google AdWords - %s
GBP', 'Commission - %s GBP' % (total_adwords, total_commission)),
TypeError: not all arguments converted during string formatting
what am i missing?
thanks
norman
You've got 'Google AdWords - %s GBP' with no arguments and 'Commission - %s
GBP' with 2 arguments.
thanks
--
Christian Witts
Python Developer
--
˙ʇı ɹoɟ ƃuıʎɐd ǝɹ,noʎ ʍou puɐ ǝɔıoɥɔ ɐ ʞooʇ ı ʇɐɥʇ sı 'ʇlnɔıɟɟıp sı ʇɐɥʍ
˙uʍop ǝpısdn p,uɹnʇ pןɹoʍ ǝɥʇ ǝǝs noʎ 'ʇuǝɯɐן sǝɯıʇ ǝɥʇ puɐ 'ʇuǝʇuoɔ
ǝq s,ʇǝן ʇǝʎ
% .join( [ {'*':'@','^':'.'}.get(c,None) or
chr(97+(ord(c)-83)%26) for c in ,adym,*)uzq^zqf ] )
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Re: [Tutor] decorators
Excellent explanation Steven; I understood the mechanical basics but this has
made the reason behind it a lot clearer.
If test_argument is only being passed the function how does it have access to
the arguments? Or is that more syntactic sugar / abbreviation for explanation?
def test_argument(func):
def inner(arg):
if not (isinstance(arg, int) and arg 0):
raise ValueError('bad argument')
arg = min(arg, 1000)
return func(arg)
return inner
@test_argument
def func(arg):
do stuff
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Re: [Tutor] decorators
Steven, Here's my cheap introduction to decorators... Beautifully explained! Thank you, Malcolm (not the OP) ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] decorators
Prasad, Ramit wrote: Excellent explanation Steven; I understood the mechanical basics but this has made the reason behind it a lot clearer. If test_argument is only being passed the function how does it have access to the arguments? It doesn't. There are three functions involved. The first is the decorator, test_argument. It only receives one argument, the function func. The second is func itself, the original function before it is wrapped. The third is the inner function of the decorator, which wraps func. Only the last two functions, func and the wrapped func, ever see the function arguments. An example may make it more clear: def decorator(f): # Wrap function f. print(decorator is called with argument %s % f) print(creating inner function...) def inner(x): print(wrapper function called with argument %s % x) return f(x+100) print(now returning the wrapped function) return inner @decorator def func(x): print(original function called with argument %s % x) func(1) func(2) func(3) When I execute that code, I get this output printed: decorator is called with argument function func at 0x922a16c creating inner function... now returning the wrapped function wrapper function called with argument 1 original function called with argument 101 wrapper function called with argument 2 original function called with argument 102 wrapper function called with argument 3 original function called with argument 103 -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
