Re: [Tutor] dealing with user input whose value I don't know
Hello Alan, dear list members,
Alan Gauld wrote:
The solution you have already seen - use string.split(',') to separate
the string into substrings and then convert each substring to an
integer.
This I have now done by using eval(). But now I wonder whether that is
actually clever because it is supposed to be similarly problematic as
the input() function in terms of security. Alternatively I could use
int() -- would that be the way forward?
Here is the code:
def main():
import string
print This program takes the average of numbers you supply!!
amount = raw_input(How many numbers do you want me to work with? )
print You want me to take the average of, amount, numbers.
numbers = raw_input(Please type the numbers, separated by commas: )
print You want to know the average of the numbers:, numbers
add = 0
for numStr in string.split(numbers, ,):
convNum = eval(numStr) # convert digit string to a number
add = add + convNum # add number to variable 'add'
print The sum of your numbers is:, add
average = add / float(amount)
print Therefore the average of your numbers is, average
main()
Many thanks,
David
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Re: [Tutor] dealing with user input whose value I don't know
David [EMAIL PROTECTED] wrote the string into substrings and then convert each substring to an integer. This I have now done by using eval(). But now I wonder whether that is actually clever because it is supposed to be similarly problematic as the input() function in terms of security. Absolutely. The more open and general you make your code the more opportunity you provide for attacks. Converting to int/float is much safer. -- 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] How trustworthy are pseudo-random numbers?
On Fri, Oct 3, 2008 at 12:44 AM, Tim Peters [EMAIL PROTECTED] wrote: [Alec Henriksen] How trustworthy is the randomness generated by the random module? Python uses the Mersenne Twister algorithm for generating pseudo-random numbers, and that's one of the highest-quality methods known. I've talked with some people about random number generation, and how you can tell if it's random. For 10 numbers, is 5 5 5 5 5 5 5 5 5 5 random? You really don't know, because it's random! It probably is. Even if the set before and after are all the same, it still could be - that's the beauty of randomness, is sometimes you can get what looks like patterns. Of course, if you're working with data encryption, this is simply not a very reliable way to do things. One of the most random ways (of course if you were able to /exactly/ duplicate the circumstances, you'd still get the same result. However it's much more difficult to duplicate the circumstances with this method.) I've seen to generate a number is getting sound input from the mic jack when there's no mic attached, and treating it like string data, then using that as your key. Hooray for Random! -Wayne ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Hands-on beginner's project?
Hm... Tried changing that, but it didn't help On Thu, Oct 2, 2008 at 9:18 AM, Luke Paireepinart [EMAIL PROTECTED]wrote: room == start is a comparison (check if room is equal to start - doesn't make a whole lot of sense to be doing that here). The room variable name doesn't exist in the current namespace, so it can't be compared to start. It looks like you wanted room = start. On 10/2/08, nathan virgil [EMAIL PROTECTED] wrote: Okay, I'm resurrecting this project. I did a little more work on it then what you see here, but that ended up getting accidentally deleted, and I haven't done anything with Python since. I'm running into one problem already, and I haven't really added any extra code. In the content (at this point, the rooms still have Bob's descriptions), the very first line of actual code (third line in the program) is returning an error. Offending code: # Content # retrieve data for current room room == start while true: if room == start: desc = Ahead of you, you see a chasm. ques = Do you wish to try jumping over it? Y/N destY = 2 destN = 3 Error: Traceback (most recent call last): File samplegame.py, line 3, in module room == start NameError: name 'room' is not defined What's going on here? ___ 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] Finding the streaks in heads/tails list
You need to store the count before resetting it since you want to know the largest value of count over the list. Or at least keep a separate max variable that you update if count max. Fairly easy: if Cur_Count Max_Count: Max_Count = Cur_Count See? Just two extra lines of code. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Hands-on beginner's project?
Okay, I'm resurrecting this project. Where is this project code? -- Have Fun, David A. Powered by Gentoo GNU/LINUX http://www.linuxcrazy.com ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Hands-on beginner's project?
On Fri, Oct 3, 2008 at 9:19 AM, David [EMAIL PROTECTED] wrote: Okay, I'm resurrecting this project. Where is this project code? http://www.linuxcrazy.com Right here. The content is going to eventually go through some drastic changes, but what's here should be good enough for testing. # Content # retrieve data for current room room = 1 if room == 1: desc = Ahead of you, you see a chasm. ques = Do you wish to try jumping over it? Y/N destYes = 2 destNo = 3 elif room == 2: desc = Ahead of you, you see a warty green ogre. ques = Do you wish to eat it? Y/N destYes = 4 destNo = 5 # etc for the rest of the rooms # Engine # ask current question and move to next room print desc ans = raw_input(ques).upper() # allow for lower case input if ans == Y: room = destYes elif ans == N: room = destNo elif ans == north: room = destN elif ans == south: room = destS elif ans == east: room = destE elif ans == west: room = destW elif ans == Q: # give us a way out. Break else: print I don't understand. Can you give a clearer answer? It seems like good code, but for some reason, it's not letting me go into Room 2 (the ogre). I remember last time I tried this, the problem had something to do with redirecting back into the same room, but I don't remember exactly what that issue was. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Hands-on beginner's project?
On Fri, Oct 3, 2008 at 8:50 AM, nathan virgil [EMAIL PROTECTED] wrote: On Fri, Oct 3, 2008 at 9:19 AM, David [EMAIL PROTECTED] wrote: Okay, I'm resurrecting this project. Where is this project code? It seems like good code, It's not. # Content # retrieve data for current room room = 1 if room == 1: this is always true because you just set room to 1 right before you checked the variable. desc = Ahead of you, you see a chasm. ques = Do you wish to try jumping over it? Y/N destYes = 2 destNo = 3 elif room == 2: this will never be true, which is why you can't get into the second room. This whole thing needs to be in a loop. But this is definitely not the best way to implement this either. desc = Ahead of you, you see a warty green ogre. ques = Do you wish to eat it? Y/N destYes = 4 destNo = 5 # etc for the rest of the rooms He's wiring these rooms together with numbers. The way I'd do it is to create a Room object with a bunch of different methods, such as room.print(), room.printDescription(), room.makeChoice(), and such, and then the rooms would be connected together using data members. It would be a lot more elegant and less confusing that way. # Engine # ask current question and move to next room print desc ans = raw_input(ques).upper() # allow for lower case input if ans == Y: room = destYes elif ans == N: room = destNo elif ans == north: room = destN elif ans == south: room = destS elif ans == east: room = destE elif ans == west: room = destW elif ans == Q: # give us a way out. Break else: print I don't understand. Can you give a clearer answer? You prompted the user, then retrieved the next room value. Now we're here, and there's no code left. So it stops here. but for some reason, it's not letting me go into Room 2 (the ogre). Is it clearer why this isn't working now? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How trustworthy are pseudo-random numbers?
[Alec Henriksen] How trustworthy is the randomness generated by the random module? Python uses the Mersenne Twister algorithm for generating pseudo-random numbers, and that's one of the highest-quality methods known. From here http://en.wikipedia.org/wiki/Pseudorandom_number_generator#Periodicity and here http://en.wikipedia.org/wiki/Mersenne_twister#Advantages I think it can be argued that the randomness is pretty trustworthy :o) ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Hands-on beginner's project?
On Fri, Oct 3, 2008 at 10:02 AM, Luke Paireepinart [EMAIL PROTECTED]wrote: On Fri, Oct 3, 2008 at 8:50 AM, nathan virgil [EMAIL PROTECTED] wrote: On Fri, Oct 3, 2008 at 9:19 AM, David [EMAIL PROTECTED] wrote: Okay, I'm resurrecting this project. Where is this project code? It seems like good code, It's not. # Content # retrieve data for current room room = 1 if room == 1: this is always true because you just set room to 1 right before you checked the variable. desc = Ahead of you, you see a chasm. ques = Do you wish to try jumping over it? Y/N destYes = 2 destNo = 3 elif room == 2: this will never be true, which is why you can't get into the second room. This whole thing needs to be in a loop. But this is definitely not the best way to implement this either. desc = Ahead of you, you see a warty green ogre. ques = Do you wish to eat it? Y/N destYes = 4 destNo = 5 # etc for the rest of the rooms He's wiring these rooms together with numbers. The way I'd do it is to create a Room object with a bunch of different methods, such as room.print(), room.printDescription(), room.makeChoice(), and such, and then the rooms would be connected together using data members. It would be a lot more elegant and less confusing that way. # Engine # ask current question and move to next room print desc ans = raw_input(ques).upper() # allow for lower case input if ans == Y: room = destYes elif ans == N: room = destNo elif ans == north: room = destN elif ans == south: room = destS elif ans == east: room = destE elif ans == west: room = destW elif ans == Q: # give us a way out. Break else: print I don't understand. Can you give a clearer answer? You prompted the user, then retrieved the next room value. Now we're here, and there's no code left. So it stops here. but for some reason, it's not letting me go into Room 2 (the ogre). Is it clearer why this isn't working now? Erm, no, not really. Are you saying I need to take out those last two lines? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Hands-on beginner's project?
On Fri, Oct 3, 2008 at 10:24 AM, nathan virgil [EMAIL PROTECTED]wrote: On Fri, Oct 3, 2008 at 10:02 AM, Luke Paireepinart [EMAIL PROTECTED] wrote: On Fri, Oct 3, 2008 at 8:50 AM, nathan virgil [EMAIL PROTECTED] wrote: On Fri, Oct 3, 2008 at 9:19 AM, David [EMAIL PROTECTED] wrote: Okay, I'm resurrecting this project. Where is this project code? It seems like good code, It's not. # Content # retrieve data for current room room = 1 if room == 1: this is always true because you just set room to 1 right before you checked the variable. desc = Ahead of you, you see a chasm. ques = Do you wish to try jumping over it? Y/N destYes = 2 destNo = 3 elif room == 2: this will never be true, which is why you can't get into the second room. This whole thing needs to be in a loop. But this is definitely not the best way to implement this either. desc = Ahead of you, you see a warty green ogre. ques = Do you wish to eat it? Y/N destYes = 4 destNo = 5 # etc for the rest of the rooms He's wiring these rooms together with numbers. The way I'd do it is to create a Room object with a bunch of different methods, such as room.print(), room.printDescription(), room.makeChoice(), and such, and then the rooms would be connected together using data members. It would be a lot more elegant and less confusing that way. # Engine # ask current question and move to next room print desc ans = raw_input(ques).upper() # allow for lower case input if ans == Y: room = destYes elif ans == N: room = destNo elif ans == north: room = destN elif ans == south: room = destS elif ans == east: room = destE elif ans == west: room = destW elif ans == Q: # give us a way out. Break else: print I don't understand. Can you give a clearer answer? You prompted the user, then retrieved the next room value. Now we're here, and there's no code left. So it stops here. but for some reason, it's not letting me go into Room 2 (the ogre). Is it clearer why this isn't working now? Erm, no, not really. Are you saying I need to take out those last two lines? Loops, then? The code this is based off of had the second line of actual code (between room = 1 and if room ==1) as while true:, but when I include this, it gives an error at that line. Is there another way to do that? Maybe while room != 4.2? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How trustworthy are pseudo-random numbers?
On Fri, Oct 3, 2008 at 4:11 PM, Daniele [EMAIL PROTECTED] wrote: From here http://en.wikipedia.org/wiki/Pseudorandom_number_generator#Periodicity and here http://en.wikipedia.org/wiki/Mersenne_twister#Advantages I think it can be argued that the randomness is pretty trustworthy :o) Nice understatement on that last page - most applications do not require 2^19937 unique combinations (2^19937 is approximately 4.315425 × 10^6001). If you used every atom in the known universe as a computer, then let them turn out a billion combinations a second for the entire time since the big bang, and call the number of combination you get then N... then take N computers turning out N combinations a second for the entire time since the big bang, and call the number of combinations they turn out N2... then take N2 computers turning out N2 combinations a second and call the number of combination they turn out in the time since the big bang and call that N3... then the number of combinations turned out by N3 computers turning out N3 combinations per second in the time since the big bang STILL dwarves in comparison to that number. -- André Engels, [EMAIL PROTECTED] ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Apress on sale at Bookpool
Bookpool.com is selling Apress titles at 50% off for December. Apress has many good Python titles: For learning Python: - Beginning Python: From Novice to Professional, Second Edition - Dive Into Python Django: - The Definitive Guide to Django: Web Development Done Right - Practical Django Projects Networking: - Foundations of Python Network Programming http://apress.com/book/catalog?category=144 http://www.bookpool.com/ct/272 Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Apress on sale at Bookpool
Oops, that's October, not December! On Fri, Oct 3, 2008 at 11:08 AM, Kent Johnson [EMAIL PROTECTED] wrote: Bookpool.com is selling Apress titles at 50% off for December. Apress has many good Python titles: For learning Python: - Beginning Python: From Novice to Professional, Second Edition - Dive Into Python Django: - The Definitive Guide to Django: Web Development Done Right - Practical Django Projects Networking: - Foundations of Python Network Programming http://apress.com/book/catalog?category=144 http://www.bookpool.com/ct/272 Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How trustworthy are pseudo-random numbers?
Is your math correct? That's ridiculously large. On Fri, Oct 3, 2008 at 10:03 AM, Andre Engels [EMAIL PROTECTED] wrote: On Fri, Oct 3, 2008 at 4:11 PM, Daniele [EMAIL PROTECTED] wrote: From here http://en.wikipedia.org/wiki/Pseudorandom_number_generator#Periodicity and here http://en.wikipedia.org/wiki/Mersenne_twister#Advantages I think it can be argued that the randomness is pretty trustworthy :o) Nice understatement on that last page - most applications do not require 2^19937 unique combinations (2^19937 is approximately 4.315425 × 10^6001). If you used every atom in the known universe as a computer, then let them turn out a billion combinations a second for the entire time since the big bang, and call the number of combination you get then N... then take N computers turning out N combinations a second for the entire time since the big bang, and call the number of combinations they turn out N2... then take N2 computers turning out N2 combinations a second and call the number of combination they turn out in the time since the big bang and call that N3... then the number of combinations turned out by N3 computers turning out N3 combinations per second in the time since the big bang STILL dwarves in comparison to that number. -- André Engels, [EMAIL PROTECTED] ___ 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] How trustworthy are pseudo-random numbers?
On Fri, Oct 3, 2008 at 5:25 PM, Luke Paireepinart [EMAIL PROTECTED] wrote: Is your math correct? That's ridiculously large. 1 year equals 3600 * 24 * 365 makes about 3*10^8 seconds. The universe is about 15.000.000.000 years old, that's about 5*10^17 seconds. With 1 billion combinations per second, each computer does 5*10^26 combinations in that time. There are something like 10^70 or 10^72 particles in the universe, thus N is about 10^100, give or take a factor of thousand or so. N2 is equal to 5*10^17 * N * N, which we will round up to 10^220. N3 by that same calculation will be about 10^460. The unnamed last number that way becomes something like 10^940 (in reality, because of all the rounding up, more like 10^930). That's less than 1/10^600 of 10^1600 - I'd say that's dwarved by any definition of the word. On Fri, Oct 3, 2008 at 10:03 AM, Andre Engels [EMAIL PROTECTED] wrote: On Fri, Oct 3, 2008 at 4:11 PM, Daniele [EMAIL PROTECTED] wrote: From here http://en.wikipedia.org/wiki/Pseudorandom_number_generator#Periodicity and here http://en.wikipedia.org/wiki/Mersenne_twister#Advantages I think it can be argued that the randomness is pretty trustworthy :o) Nice understatement on that last page - most applications do not require 2^19937 unique combinations (2^19937 is approximately 4.315425 × 10^6001). If you used every atom in the known universe as a computer, then let them turn out a billion combinations a second for the entire time since the big bang, and call the number of combination you get then N... then take N computers turning out N combinations a second for the entire time since the big bang, and call the number of combinations they turn out N2... then take N2 computers turning out N2 combinations a second and call the number of combination they turn out in the time since the big bang and call that N3... then the number of combinations turned out by N3 computers turning out N3 combinations per second in the time since the big bang STILL dwarves in comparison to that number. -- André Engels, [EMAIL PROTECTED] ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor -- André Engels, [EMAIL PROTECTED] ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How trustworthy are pseudo-random numbers?
On Fri, Oct 3, 2008 at 5:32 PM, Andre Engels [EMAIL PROTECTED] wrote: On Fri, Oct 3, 2008 at 5:25 PM, Luke Paireepinart [EMAIL PROTECTED] wrote: Is your math correct? That's ridiculously large. 1 year equals 3600 * 24 * 365 makes about 3*10^8 seconds. The universe is about 15.000.000.000 years old, that's about 5*10^17 seconds. With 1 billion combinations per second, each computer does 5*10^26 combinations in that time. There are something like 10^70 or 10^72 particles in the universe, thus N is about 10^100, give or take a factor of thousand or so. N2 is equal to 5*10^17 * N * N, which we will round up to 10^220. N3 by that same calculation will be about 10^460. The unnamed last number that way becomes something like 10^940 (in reality, because of all the rounding up, more like 10^930). That's less than 1/10^600 of 10^1600 - I'd say that's dwarved by any definition of the word. Oh, wait, I had to compare to 10^6001 instead of 10^1600... Which means I could have gone on to N6 instead of N4. On Fri, Oct 3, 2008 at 10:03 AM, Andre Engels [EMAIL PROTECTED] wrote: On Fri, Oct 3, 2008 at 4:11 PM, Daniele [EMAIL PROTECTED] wrote: From here http://en.wikipedia.org/wiki/Pseudorandom_number_generator#Periodicity and here http://en.wikipedia.org/wiki/Mersenne_twister#Advantages I think it can be argued that the randomness is pretty trustworthy :o) Nice understatement on that last page - most applications do not require 2^19937 unique combinations (2^19937 is approximately 4.315425 × 10^6001). If you used every atom in the known universe as a computer, then let them turn out a billion combinations a second for the entire time since the big bang, and call the number of combination you get then N... then take N computers turning out N combinations a second for the entire time since the big bang, and call the number of combinations they turn out N2... then take N2 computers turning out N2 combinations a second and call the number of combination they turn out in the time since the big bang and call that N3... then the number of combinations turned out by N3 computers turning out N3 combinations per second in the time since the big bang STILL dwarves in comparison to that number. -- André Engels, [EMAIL PROTECTED] ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor -- André Engels, [EMAIL PROTECTED] -- André Engels, [EMAIL PROTECTED] ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How trustworthy are pseudo-random numbers?
2008/10/3 Andre Engels [EMAIL PROTECTED]: On Fri, Oct 3, 2008 at 4:11 PM, Daniele [EMAIL PROTECTED] wrote: If you used every atom in the known universe as a computer, then let them turn out a billion combinations a second for the entire time since the big bang, and call the number of combination you get then N [...].. then the number of combinations turned out by N3 computers turning out N3 combinations per second in the time since the big bang STILL dwarves in comparison to that number. Excellent Proof of concept! ,-) ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How trustworthy are pseudo-random numbers?
Andre Engels wrote: On Fri, Oct 3, 2008 at 5:25 PM, Luke Paireepinart [EMAIL PROTECTED] wrote: Is your math correct? That's ridiculously large. 1 year equals 3600 * 24 * 365 makes about 3*10^8 seconds. The universe is about 15.000.000.000 years old, that's about 5*10^17 seconds. With 1 billion combinations per second, each computer does 5*10^26 combinations in that time. There are something like 10^70 or 10^72 particles in the universe, thus N is about 10^100, give or take a factor of thousand or so. N2 is equal to 5*10^17 * N * N, which we will round up to 10^220. N3 by that same calculation will be about 10^460. The unnamed last number that way becomes something like 10^940 (in reality, because of all the rounding up, more like 10^930). That's less than 1/10^600 of 10^1600 - I'd say that's dwarved by any definition of the word. Wowee! Golleee! Gosh! That sure be some fine number crunching. Robert ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Hands-on beginner's project?
Loops, then? The code this is based off of had the second line of actual code (between room = 1 and if room ==1) as while true:, but when I include this, it gives an error at that line. Is there another way to do that? Maybe while room != 4.2? What you had before was... room = 1 if room == 1 # Room 1 stuff elif... #Stuff that never got executed # End of program. Try... room = 1 while 1: if room == 1: # Room 1 stuff elif room == 2: # Room 2 stuff Your switching variable can't be the loop control and you do need to be in a loop for the conditional expression to be evaluated again after you've changed the value of room. Chris -- Make a difference in the world and support more Diplomacy projects and services then you can shake a dagger at, please read: http://members.bluegoosenews.com/diplomacy/blog/2008/09/24/a_special_note_for_diplomacy_players - or - http://tinyurl.com/3wx6lb Blue Goose is willing to give me $250 to support various services and projects in the Diplomacy hobby. The blog post above will tell you why they are doing this, what I will do with the money, and what you can do to help me get it. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] assigning values to dictionary
I have a list of dictionary values that i am looping through that upon each iteration I would like to assign these values to a new dictionary name. For example... item=0 for line in some_dict: ## some how assign dict values to new name new_dict_name_+item = line I have not tested the example code above and is displayed simply for demonstration purposes. Any thoughts on how to do this? Thanks, JJ Disclaimer: The information contained in this transmission, including any attachments, may contain confidential information of Panasonic Avionics Corporation. This transmission is intended only for the use of the addressee(s) listed above. Unauthorized review, dissemination or other use of the information contained in this transmission is strictly prohibited. If you have received this transmission in error or have reason to believe you are not authorized to receive it, please notify the sender by return email and promptly delete the transmission. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Hands-on beginner's project?
On Fri, Oct 03, 2008 at 09:38:56AM -0700, Chris Babcock wrote: room = 1 while 1: Also, it may be more clear to say while True: in preference to while 1:. Note that in your earlier version you didn't capitalize True which meant Python had no idea what that value was (could be a variable or something). True and False (and None, for that matter) are all capitalized. if room == 1: # Room 1 stuff elif room == 2: # Room 2 stuff This is a good start while you're learning to program initially. You'll later want to see how to generalize this so the collection of rooms and connections between them exists in _data_ instead of _code_. Something to simmer on the back burner until you're ready for that step. -- Steve Willoughby| Using billion-dollar satellites [EMAIL PROTECTED] | to hunt for Tupperware. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] UnicodeEncodeError
I'm working on a python application that stores email in a postgresql database and I'm encountering the UnicodeEncodeError - while storing a particular email I receive this error UnicodeEncodeError: 'charmap' codec can't encode character u'\u2019' in position 144: character maps to undefined I'm a little confused about a workaround for this, from what I've googled the approach seems to be to use the codecs.register_error and codecs.ignore_errors to skip processing of the offending character. I haven't been able to find an understandable example though, so if anyone has one that would be great. Rob ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] assigning values to dictionary
On Fri, Oct 03, 2008 at 10:29:13AM -0700, jeremiah wrote: I have a list of dictionary values that i am looping through that upon each iteration I would like to assign these values to a new dictionary name. For example... item=0 for line in some_dict: ## some how assign dict values to new name new_dict_name_+item = line You could use eval, I suppose, but are you sure that making up new dictionary names on the fly like that is the solution that best fits the problem as opposed to having, say, a set of objects or an overall dictionary of dictionaries you add to? What's the bigger context this fits into? Although you *can* do this sort of thing, it quite often ends up not being the most elegant thing to do. -- Steve Willoughby| Using billion-dollar satellites [EMAIL PROTECTED] | to hunt for Tupperware. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] assigning values to dictionary
i think i figured it out. The result is that I have a dictionary within
a dictionary..i think.
for example:
{'mcdonalds': {'hamburger': 'big mac','drink':'coke'}}
How would I go about itterating through this?
Thanks,
JJ
On Fri, 2008-10-03 at 10:39 -0700, Steve Willoughby wrote:
On Fri, Oct 03, 2008 at 10:29:13AM -0700, jeremiah wrote:
I have a list of dictionary values that i am looping through that
upon
each iteration I would like to assign these values to a new
dictionary
name.
For example...
item=0
for line in some_dict:
## some how assign dict values to new name
new_dict_name_+item = line
You could use eval, I suppose, but are you sure that
making up new dictionary names on the fly like that is
the solution that best fits the problem as opposed to
having, say, a set of objects or an overall dictionary
of dictionaries you add to? What's the bigger context
this fits into? Although you *can* do this sort of thing,
it quite often ends up not being the most elegant thing
to do.
--
Steve Willoughby| Using billion-dollar satellites
[EMAIL PROTECTED] | to hunt for Tupperware.
Disclaimer: The information contained in this transmission, including any
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Re: [Tutor] assigning values to dictionary
On Fri, Oct 3, 2008 at 1:02 PM, jeremiah [EMAIL PROTECTED]wrote:
i think i figured it out. The result is that I have a dictionary within
a dictionary..i think.
for example:
{'mcdonalds': {'hamburger': 'big mac','drink':'coke'}}
How would I go about itterating through this?
for k, v in items(mydict):
for k, v in items(v):
print k, v
I think that should work
hth,
Wayne
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Re: [Tutor] assigning values to dictionary
On Fri, Oct 03, 2008 at 11:02:34AM -0700, jeremiah wrote:
i think i figured it out. The result is that I have a dictionary within
a dictionary..i think.
for example:
{'mcdonalds': {'hamburger': 'big mac','drink':'coke'}}
How would I go about itterating through this?
Depends on how you want to iterate through it (what
in the end you're trying to accomplish). One example:
for major_key in my_dict:
print The stuff stored under, major_key, is:
for minor_key in my_dict[major_key]:
print (%s) %s=%s % (major_key, minor_key, my_dict[major_key][minor_key])
Another possibility might be:
for major_key, subdict in my_dict.iteritems():
print The stuff stored under, major_key, is:
for minor_key, value in subdict.iteritems():
print (%s) %s=%s % (major_key, minor_key, value)
Thanks,
JJ
On Fri, 2008-10-03 at 10:39 -0700, Steve Willoughby wrote:
On Fri, Oct 03, 2008 at 10:29:13AM -0700, jeremiah wrote:
I have a list of dictionary values that i am looping through that
upon
each iteration I would like to assign these values to a new
dictionary
name.
For example...
item=0
for line in some_dict:
## some how assign dict values to new name
new_dict_name_+item = line
You could use eval, I suppose, but are you sure that
making up new dictionary names on the fly like that is
the solution that best fits the problem as opposed to
having, say, a set of objects or an overall dictionary
of dictionaries you add to? What's the bigger context
this fits into? Although you *can* do this sort of thing,
it quite often ends up not being the most elegant thing
to do.
--
Steve Willoughby| Using billion-dollar satellites
[EMAIL PROTECTED] | to hunt for Tupperware.
Disclaimer: The information contained in this transmission, including any
attachments, may contain confidential information of Panasonic Avionics
Corporation. This transmission is intended only for the use of the
addressee(s) listed above. Unauthorized review, dissemination or other use
of the information contained in this transmission is strictly prohibited.
If you have received this transmission in error or have reason to believe
you are not authorized to receive it, please notify the sender by return
email and promptly delete the transmission.
--
Steve Willoughby| Using billion-dollar satellites
[EMAIL PROTECTED] | to hunt for Tupperware.
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Re: [Tutor] assigning values to dictionary
Awesome. Thanks!
On Fri, 2008-10-03 at 11:07 -0700, Steve Willoughby wrote:
On Fri, Oct 03, 2008 at 11:02:34AM -0700, jeremiah wrote:
i think i figured it out. The result is that I have a dictionary
within
a dictionary..i think.
for example:
{'mcdonalds': {'hamburger': 'big mac','drink':'coke'}}
How would I go about itterating through this?
Depends on how you want to iterate through it (what
in the end you're trying to accomplish). One example:
for major_key in my_dict:
print The stuff stored under, major_key, is:
for minor_key in my_dict[major_key]:
print (%s) %s=%s % (major_key, minor_key,
my_dict[major_key][minor_key])
Another possibility might be:
for major_key, subdict in my_dict.iteritems():
print The stuff stored under, major_key, is:
for minor_key, value in subdict.iteritems():
print (%s) %s=%s % (major_key, minor_key, value)
Thanks,
JJ
On Fri, 2008-10-03 at 10:39 -0700, Steve Willoughby wrote:
On Fri, Oct 03, 2008 at 10:29:13AM -0700, jeremiah wrote:
I have a list of dictionary values that i am looping through
that
upon
each iteration I would like to assign these values to a new
dictionary
name.
For example...
item=0
for line in some_dict:
## some how assign dict values to new name
new_dict_name_+item = line
You could use eval, I suppose, but are you sure that
making up new dictionary names on the fly like that is
the solution that best fits the problem as opposed to
having, say, a set of objects or an overall dictionary
of dictionaries you add to? What's the bigger context
this fits into? Although you *can* do this sort of thing,
it quite often ends up not being the most elegant thing
to do.
--
Steve Willoughby| Using billion-dollar satellites
[EMAIL PROTECTED] | to hunt for Tupperware.
Disclaimer: The information contained in this transmission,
including any
attachments, may contain confidential information of Panasonic
Avionics
Corporation. This transmission is intended only for the use of the
addressee(s) listed above. Unauthorized review, dissemination or
other use
of the information contained in this transmission is strictly
prohibited.
If you have received this transmission in error or have reason to
believe
you are not authorized to receive it, please notify the sender by
return
email and promptly delete the transmission.
--
Steve Willoughby| Using billion-dollar satellites
[EMAIL PROTECTED] | to hunt for Tupperware.
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[Tutor] Coin Flip
This is a class assignment, I am to create a program that flips a coin 100 times and tells me the number of heads and tails. I've been working on it for 2 days now and I am stuck. I a trying to run the program but it is not running. Can someone please point out my error? Here is what I have come up with: import random heads=0 tails=0 count=1 while count 101: randomFlip = random.randrange(0,1) if randomFlip == 0: heads = heads + 1 else: tails = tails + 1 count = count + 1 print heads, heads print tails, tails -- View this message in context: http://www.nabble.com/Coin-Flip-tp19802888p19802888.html Sent from the Python - tutor mailing list archive at Nabble.com. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] UnicodeEncodeError
On Fri, Oct 3, 2008 at 1:50 PM, Rob Sutherland [EMAIL PROTECTED] wrote: I'm working on a python application that stores email in a postgresql database and I'm encountering the UnicodeEncodeError - while storing a particular email I receive this error UnicodeEncodeError: 'charmap' codec can't encode character u'\u2019' in position 144: character maps to undefined I'm a little confused about a workaround for this, from what I've googled the approach seems to be to use the codecs.register_error and codecs.ignore_errors to skip processing of the offending character. I haven't been able to find an understandable example though, so if anyone has one that would be great. It helps if you show the code that is causing the error and the full traceback. Presumably you are calling someString.encode(some encoding) where some encoding is an encoding that doesn't include the character U+2019 right single quotation mark http://www.eki.ee/letter/chardata.cgi?ucode=2019 The string encode() method takes a second argument which indicates how errors should be handled. See the docs for the options: http://docs.python.org/library/stdtypes.html#str.encode Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Coin Flip
Since the variable *count* never increases inside of the loop body, it gets stuck in the *while* loop. I recommend taking a hard look at the program, consider what it should be doing, and then seeing which statements should be in the *while* loop, and which ones should be outside it. Tony R. On Fri, Oct 3, 2008 at 2:04 PM, realNewbie [EMAIL PROTECTED] wrote: This is a class assignment, I am to create a program that flips a coin 100 times and tells me the number of heads and tails. I've been working on it for 2 days now and I am stuck. I a trying to run the program but it is not running. Can someone please point out my error? Here is what I have come up with: import random heads=0 tails=0 count=1 while count 101: randomFlip = random.randrange(0,1) if randomFlip == 0: heads = heads + 1 else: tails = tails + 1 count = count + 1 print heads, heads print tails, tails -- View this message in context: http://www.nabble.com/Coin-Flip-tp19802888p19802888.html Sent from the Python - tutor mailing list archive at Nabble.com. ___ 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] Coin Flip
First off, check your program's indentation. On Fri, Oct 3, 2008 at 2:04 PM, realNewbie [EMAIL PROTECTED] wrote: This is a class assignment, I am to create a program that flips a coin 100 times and tells me the number of heads and tails. I've been working on it for 2 days now and I am stuck. I a trying to run the program but it is not running. Can someone please point out my error? Here is what I have come up with: import random heads=0 tails=0 count=1 while count 101: randomFlip = random.randrange(0,1) if randomFlip == 0: heads = heads + 1 else: tails = tails + 1 count = count + 1 print heads, heads print tails, tails -- View this message in context: http://www.nabble.com/Coin-Flip-tp19802888p19802888.html Sent from the Python - tutor mailing list archive at Nabble.com. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor -- b h a a l u u at g m a i l dot c o m Kid on Bus: What are you gonna do today, Napoleon? Napoleon Dynamite: Whatever I feel like I wanna do. Gosh! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] UnicodeEncodeError
On Fri, Oct 3, 2008 at 2:39 PM, Rob Sutherland [EMAIL PROTECTED] wrote: On Fri, Oct 3, 2008 at 12:23 PM, Kent Johnson [EMAIL PROTECTED] wrote: It helps if you show the code that is causing the error and the full traceback. Presumably you are calling someString.encode(some encoding) where some encoding is an encoding that doesn't i I'm encountering this error while attempting to store the string in a database, the code I execute is cur.execute(statement ,attachDict) which falls through to the code that actually does the encoding in /usr/lib/python2.4/encodings/iso8859_1.py Traceback (most recent call last): File ./mail2db.py, line 219, in ? storemail(cur, conn,emailDict,attachment_hold) File ./mail2db.py, line 118, in storemail attachments_ok = storeattachment(cur,conn,search_message_id,attachment_hold) File ./mail2db.py, line 61, in storeattachment cur.execute(statement ,attachDict) File /usr/lib/python2.4/site-packages/psycopg2/extras.py, line 88, in execute return _cursor.execute(self, query, vars, async) File /usr/lib/python2.4/encodings/iso8859_1.py, line 18, in encode return codecs.charmap_encode(input,errors,encoding_map) UnicodeEncodeError: 'charmap' codec can't encode character u'\u2019' in position 144: character maps to undefined My guess is, your database is set up to hold ISO-8859-1 data (Latin-1). You are giving it Unicode data, so it tries to encode as Latin-1. The data includes a character that is not in Latin-1 so it fails. I would try explicitly converting the data to latin-1 before you send it to the database, giving it one of the forgiving error handling methods I referred to earlier. Or, change your database to UTF-8... Kent PS Please use Reply All to reply to the list. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] keep from opening multiple Toplevel windows
I have a Tkinter button widget that when pressed invokes a Toplevel window call each time. The Toplevel window thus generated has a close button on it. As you might guess, when multiple Toplevel windows are open, I can press on a 'close' button to '.destroy' the window, but all other Toplevel windows remain and do not respond to their 'close' buttons. I understand why THIS happens, but... The behavior I seek is that one and only one Toplevel window gets generated no matter how many times the original Tkinter button is pressed. A new Toplevel is generated only after the previous one is closed. My question is: how does one check that a particular Toplevel window is open? I've tried just checking on the Toplevel widget name with try-except, but the value of the Toplevel name stays persistent even when the .destroy method is used to kill the Toplevel window, which makes try-except think the Toplevel is still open. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
