Re: [Tutor] Blackjack Betting
Sorry. Here is the entire Error stack if this can help. Traceback (most recent call last): File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 240, in module main() File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 236, in main game.play() File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 204, in play player.win() File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 129, in win bet.stash += bet.wager Prasad, Ramit wrote: I keep getting the error: “NameError: global name 'bet' is not defined.” I know I came across this error before in a previous thread, but I am confused on how to solve this, since I am also trying to juggle it with inherited methods at the same time. Telling us this without the stack trace is pretty unhelpful. The Python exceptions include a very good stack trace (with line numbers +- 1 line) and a decent description. This error means that wherever this error was raised was a reference to the name bet and it had no reference to any bet at that point. The reasons could be that you forgot to assign a value to the name first, maybe it was a typo, in a preceding function, forgot the reference to self, etc, etc. I took a *quick* look at the code and found this (I did not check for other problems or if this error happens in more than one place): class BJ_Player(BJ_Hand, Bet): A Blackjack Player. def is_hitting(self): response = games.ask_yes_no(\n + self.name + , do you want a hit? (Y/N): ) return response == y def bust(self): print(self.name, busts.) self.lose() def lose(self): print(self.name, loses.) betting = Bet() bet.stash -= bet.wager def win(self): print(self.name, wins.) bet = Bet() bet.stash += bet.wager def push(self): print(self.name, pushes.) There are a couple things wrong with this class. First, you never define an __init__ which might be technically okay but is unlikely to be what you want for any user defined class (especially one with multiple inheritance). Since there is no __init__ defined, it will call the first parent class BJ_Hand.__init__ but not the second parent class Bet.__init__ (if it has one). Next for BJ_Player.lose(), bet is never defined and thus neither is bet.stash. Maybe you meant betting.stash -= betting.wager? I bet if you ran lint/pylint on this module it would have told you the error without even having to run it. Ramit Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology 712 Main Street | Houston, TX 77002 work phone: 713 - 216 - 5423 -Original Message- From: tutor-bounces+ramit.prasad=jpmchase@python.org [mailto:tutor-bounces+ramit.prasad=jpmchase@python.org] On Behalf Of Vincent Balmori Sent: Thursday, June 30, 2011 1:49 PM To: tutor@python.org Subject: [Tutor] Blackjack Betting I have been working on another challenge that involves improving the Blackjack program so the players can wager an amount. If a player loses they will be removed from the game. I keep getting the error: “NameError: global name 'bet' is not defined.” I know I came across this error before in a previous thread, but I am confused on how to solve this, since I am also trying to juggle it with inherited methods at the same time. Here is the old and new file for the blackjack program for comparison: http://old.nabble.com/file/p31966195/blackjack.py blackjack.py http://old.nabble.com/file/p31966195/blackjackbetting.py blackjackbetting.py -- View this message in context: http://old.nabble.com/Blackjack-Betting-tp31966195p31966195.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 This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any
Re: [Tutor] Blackjack Betting
Here is the other one that occurs when I lose Traceback (most recent call last): File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 240, in module main() File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 236, in main game.play() File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 211, in play player.lose() File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 124, in lose bet.stash -= bet.wager NameError: global name 'bet' is not defined Prasad, Ramit wrote: I keep getting the error: “NameError: global name 'bet' is not defined.” I know I came across this error before in a previous thread, but I am confused on how to solve this, since I am also trying to juggle it with inherited methods at the same time. Telling us this without the stack trace is pretty unhelpful. The Python exceptions include a very good stack trace (with line numbers +- 1 line) and a decent description. This error means that wherever this error was raised was a reference to the name bet and it had no reference to any bet at that point. The reasons could be that you forgot to assign a value to the name first, maybe it was a typo, in a preceding function, forgot the reference to self, etc, etc. I took a *quick* look at the code and found this (I did not check for other problems or if this error happens in more than one place): class BJ_Player(BJ_Hand, Bet): A Blackjack Player. def is_hitting(self): response = games.ask_yes_no(\n + self.name + , do you want a hit? (Y/N): ) return response == y def bust(self): print(self.name, busts.) self.lose() def lose(self): print(self.name, loses.) betting = Bet() bet.stash -= bet.wager def win(self): print(self.name, wins.) bet = Bet() bet.stash += bet.wager def push(self): print(self.name, pushes.) There are a couple things wrong with this class. First, you never define an __init__ which might be technically okay but is unlikely to be what you want for any user defined class (especially one with multiple inheritance). Since there is no __init__ defined, it will call the first parent class BJ_Hand.__init__ but not the second parent class Bet.__init__ (if it has one). Next for BJ_Player.lose(), bet is never defined and thus neither is bet.stash. Maybe you meant betting.stash -= betting.wager? I bet if you ran lint/pylint on this module it would have told you the error without even having to run it. Ramit Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology 712 Main Street | Houston, TX 77002 work phone: 713 - 216 - 5423 -Original Message- From: tutor-bounces+ramit.prasad=jpmchase@python.org [mailto:tutor-bounces+ramit.prasad=jpmchase@python.org] On Behalf Of Vincent Balmori Sent: Thursday, June 30, 2011 1:49 PM To: tutor@python.org Subject: [Tutor] Blackjack Betting I have been working on another challenge that involves improving the Blackjack program so the players can wager an amount. If a player loses they will be removed from the game. I keep getting the error: “NameError: global name 'bet' is not defined.” I know I came across this error before in a previous thread, but I am confused on how to solve this, since I am also trying to juggle it with inherited methods at the same time. Here is the old and new file for the blackjack program for comparison: http://old.nabble.com/file/p31966195/blackjack.py blackjack.py http://old.nabble.com/file/p31966195/blackjackbetting.py blackjackbetting.py -- View this message in context: http://old.nabble.com/Blackjack-Betting-tp31966195p31966195.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 This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED.
Re: [Tutor] Blackjack Betting
On Fri, Jul 1, 2011 at 9:29 AM, Vincent Balmori vincentbalm...@yahoo.comwrote: Here is the other one that occurs when I lose Traceback (most recent call last): File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 240, in module main() File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 236, in main game.play() File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 211, in play player.lose() File /Users/vincentbalmori/Desktop/Python/py3e_source/chapter09/blackjackbetting.py, line 124, in lose bet.stash -= bet.wager NameError: global name 'bet' is not defined That error message is really quite expressive, it would much more help you to learn to read it yourself than to run to us every time something goes wrong. The most interesting part of an error message are its last few lines, they say what went wrong, and where it happened. The rest tells you how it got there, which also is important to know sometimes, but many errors can already be solved without looking at it. In this case, the error message says: NameError: global name 'bet' is not defined That means, at some time at the program, it is told to do something with 'bet', but there is no variable bet. And when does that happen? That too is told: at line 124, which says: bet.stash -= bet.wager Go to that line and read your code yourself - what is this 'bet' of which the stash is to be lessened by its wager? Have you told your program that this is the value of the variable 'bet'? Where and how? -- André Engels, andreeng...@gmail.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Limit raw_input to hundredth decimal point
Is there a way to limit raw_input to the hundredth decimal point? For example, I'd like to allow the user to enter 5.75 but not 5.756: dollars = raw_input(Please enter a dollar amount: $) Thanks! ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] problem reading script
I am supposed to be looking at scripts on-line, reading them and making sure that I understand them. I think taht most of teh things I can't make more than a guess at, are modules taht I don't know, and I can mostly make them out. But the unpaired double quotation mark, , in the following has me stumped: report['BzrLogTail'] = ''.join(bzr_log_tail) The line ends accurately as it did in the script I was looking at. In case you need the whole script to make out what the means, the URL is: http://bazaar.launchpad.net/~bzr-pqm/bzr/bzr.dev/view/head:/apport/source_bzr.py and I have copied and pasted the function definition in which it is to be found after my signature. I would be extremely grateful for an explanation/translation! Lisi def _add_log_tail(report): # may have already been added in-process if 'BzrLogTail' in report: return bzr_log_lines = open(bzr_log).readlines() bzr_log_lines.reverse() bzr_log_tail = [] blanks = 0 for line in bzr_log_lines: if line == '\n': blanks += 1 bzr_log_tail.append(line) 27 if blanks = 2: 28 break 29 30 bzr_log_tail.reverse() 31 report['BzrLogTail'] = ''.join(bzr_log_tail) ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem reading script
On Friday 01 July 2011 10:15:08 Lisi wrote: I am supposed to be looking at scripts on-line, reading them and making sure that I understand them. I think taht most of teh things I can't make more than a guess at, are modules taht I don't know, and I can mostly make them out. But the unpaired double quotation mark, , in the following has me stumped: report['BzrLogTail'] = ''.join(bzr_log_tail) The line ends accurately as it did in the script I was looking at. In case you need the whole script to make out what the means, the URL is: http://bazaar.launchpad.net/~bzr-pqm/bzr/bzr.dev/view/head:/apport/source_b zr.py So sorry. Forgot to check typos before clicking on send. :-( ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem reading script
Greetings Lisi, : I am supposed to be looking at scripts on-line, reading them and : making sure that I understand them. When you see an example that you don't understand, consider trying to do something similar in an interactive Python interpreter. This is a simple way to learn in Python. : I think taht most of teh things I can't make more than a guess : at, are modules taht I don't know, and I can mostly make them : out. But the unpaired double quotation mark, , in the : following has me stumped: Look carefully. It is not an unpaired double-quotation mark. Are you using a monospaced font to read code? If you are using a variable width font, you should change to monospaced. Save yourself some future headache. Really. Use a monospaced font. : report['BzrLogTail'] = ''.join(bzr_log_tail) Do you have a Python interpreter handy? This is a fairly typical pythonic expression for concatenating elements of a list into a string. Try the following in a python interpreter: l = list() l.append(a) l.append(b) l.append(c) l ['a', 'b', 'c'] ''.join(l) 'abc' Now, you are probably wondering about that peculiar looking syntax for calling join() on a list. This single quoted empty string '' is still a string, so it has methods that can be called on it. Read up on methods available on strings [0] to get a better idea. For other examples of using the string join() method, consider the following: ':'.join(l) 'a:b:c' vampire = [ 'The','Deluxe','Transitive','Vampire' ] ' '.join(vampire) 'The Deluxe Transitive Vampire' And, for something just a bit fancier, make a list of ints, using the function called range(): range(10) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] Convert them to a list of strings: [str(x) for x in range(10)] ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'] Now, concatenate them and separate with some spacedash! visual_separator = ' -- ' visual_separator.join(str(x) for x in range(10)) '0 -- 1 -- 2 -- 3 -- 4 -- 5 -- 6 -- 7 -- 8 -- 9' With any luck, these examples help explain what you were reading. -Martin [0] http://docs.python.org/dev/library/stdtypes.html#string-methods -- Martin A. Brown http://linux-ip.net/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Limit raw_input to hundredth decimal point
You can use a regular expression or plain simple len() 2011/7/1 Ryan Kirk ryank...@me.com Is there a way to limit raw_input to the hundredth decimal point? For example, I'd like to allow the user to enter 5.75 but not 5.756: dollars = raw_input(Please enter a dollar amount: $) Thanks! ___ 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] Limit raw_input to hundredth decimal point
On 2011/07/01 09:30 AM, Ryan Kirk wrote: Is there a way to limit raw_input to the hundredth decimal point? For example, I'd like to allow the user to enter 5.75 but not 5.756: dollars = raw_input(Please enter a dollar amount: $) Thanks! ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor If you're using Windows you can use the msvcrt module which has an implementation of getch() which gets 1 character at a time. Then you would just scan your input 1 character at a time and as soon as a the `.` is used you can limit it to 2 further key-strokes before you ban input and carry on in your process flow. -- Christian Witts Python Developer // ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] 2to3 conversion
Zubin Mithra wrote:
Hey everyone,
I was running 2to3 on a particular file and I got the following traceback(
http://paste.pocoo.org/show/223468/).
For short amounts of text, such as a traceback, please don't use a paste
bin, just copy it into your post.
Some people are reading mail at a time or place where they might not
have web access, or from somewhere that blocks access to the paste bin,
but they can still read mail.
In your case, the error is:
Traceback (most recent call last):
File setup.py, line 86, in module
util.run_2to3([i])
File /usr/lib/python3.0/distutils/util.py, line 572, in run_2to3
r.refactor(files, write=True)
File /usr/lib/python3.0/lib2to3/refactor.py, line 196, in refactor
self.refactor_file(dir_or_file, write, doctests_only)
File /usr/lib/python3.0/lib2to3/refactor.py, line 224, in refactor_file
input = f.read() + \n # Silence certain parse errors
File /usr/lib/python3.0/io.py, line 1728, in read
decoder.decode(self.buffer.read(), final=True))
File /usr/lib/python3.0/io.py, line 1299, in decode
output = self.decoder.decode(input, final=final)
File /usr/lib/python3.0/codecs.py, line 300, in decode
(result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf8' codec can't decode bytes in position 232-234:
invalid data
which looks like a bug in the 2to3 script.
This is not really a tutor question -- this list is for learning Python,
not general Python related questions. In future, you might have better
responses on the main python list, python-l...@python.org.
But my guess is that the source file you are trying to convert contains
an encoded character that doesn't exist in UTF-8. Try opening the
original file (not the copy on the paste bin) and extracting those three
bytes, and see what they are:
fp = open('distutils.util.py', 'r')
text = fp.read(234)
fp.close()
n = len(text.split('\n'))
s = text[232:235]
print(Bad bytes %r on line %d % (s, n))
--
Steven
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Re: [Tutor] 2to3 conversion
Steven D'Aprano wrote: Zubin Mithra wrote: Hey everyone, I was running 2to3 on a particular file and I got the following traceback( http://paste.pocoo.org/show/223468/). For short amounts of text, such as a traceback, please don't use a paste bin, just copy it into your post. *blinks* Oh my, that's hilarious. Sorry folks, nothing to see here... I accidentally clicked on an unread email from 2010 (!!!) and thought it had just come in. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Limit raw_input to hundredth decimal point
Ryan Kirk wrote: Is there a way to limit raw_input to the hundredth decimal point? No. raw_input is a tool that does one thing: it collects input from the user. It doesn't understand numbers, check for decimal places, check the input for spelling errors, or anything else. It's a hammer, not a combination hammer-screwdriver-wrench-drill-saw-axe :) One solution is to build a new tool that checks for decimal places: def check(text): try: x = float(text) except ValueError: print please enter a number return None y = x*100 if y - int(y) != 0: print please enter only two decimal places return None return x def get_number(prompt): answer = None while answer is None: text = raw_input(prompt) answer = check(text) return answer At first, this seems to work well: get_number(Please enter a number with two decimal places: ) Please enter a number with two decimal places: 77.25 77.25 but there's a fundamental problem. The user is entering numbers in decimal (base 10), but Python does calculations in binary (base 2), and something that has two decimal places may not be exact in binary: get_number(Please enter a number with two decimal places: ) Please enter a number with two decimal places: 77.21 please enter only two decimal places Huh? 77.21 does have two decimal places. But the closest float to 77.21 is in fact 77.204. No computer on Earth can store 77.21 *exactly* as a binary float, no matter how hard you try! So, what to do...? You can: (1) Give up on forcing the user to only enter two decimal places, and instead use the round() function to round to two places: round(77.2123456, 2) 77.204 This is still not two decimal places, but it is the closest possible float to 7.21, so you can't do any better. (2) Or give up on using float, and use the decimal module instead. (However decimals are slower and less convenient than floats.) from decimal import Decimal x = Decimal(77.21) x Decimal(77.21) If you are working with currency, then you should use decimal, and not floats. Good luck! -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Blackjack Betting
On 7/1/2011 12:51 AM Andre Engels said... In this case, the error message says: NameError: global name 'bet' is not defined Note use of the term global? That means, at some time at the program, it is told to do something with 'bet', but there is no variable bet. And when does that happen? That too is told: at line 124, which says: bet.stash -= bet.wager Go to that line and read your code yourself - what is this 'bet' of which the stash is to be lessened by its wager? Have you told your program that this is the value of the variable 'bet'? Where and how? Further, because global is used, it tells you that 'bet' is not in the local scope, nor in the global scope. Python's general scoping resolution rule is local-global-builtin. So bet, wherever you think it may be defined, lives in a different namespace. See http://docs.python.org/tutorial/classes.html Emile ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem reading script
Lisi wrote: I am supposed to be looking at scripts on-line, reading them and making sure that I understand them. I think taht most of teh things I can't make more than a guess at, are modules taht I don't know, and I can mostly make them out. But the unpaired double quotation mark, , in the following has me stumped: report['BzrLogTail'] = ''.join(bzr_log_tail) There is no unpaired double quote mark. Compare: '' # pairs single quote marks # unpaired double quote mark If they look the same to you, then you need to increase your font size, change to a programmers font, or possible clean your glasses :) -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem reading script
On Friday 01 July 2011 14:26:07 Steven D'Aprano wrote: If they look the same to you, then you need to increase your font size, change to a programmers font, or possible clean your glasses :) Thanks for the reply, Steven. Suggestions for a programmers font gratefully received. I do have problems with my sight, and need to have my browser set to a font that I can read. But I could copy and paste to a WP and change the font for just that little bit. This particular text seems to work with a serif font. But it would be useful to know a specific programmer's font for when I am having difficulty seeing this particular distinction. I am used to having to look at just one word in a different font to distinguish between I and l (which currently look identical to me), where the context doesn't help. All I have to do now is work out/ look up what '' means!! Lisi ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] The Card Game
Sorry, I haven't upgraded to 3 yet. On Thursday, June 30, 2011, Steven D'Aprano st...@pearwood.info wrote: Christopher King wrote: I would go with __cmp__ which covers them all. 1 for greater, 0 for equal, -1 for less than. So-called rich comparisons using __lt__, __gt__, etc. have been preferred since Python 2.1. The major advantage of them is that they can be used for more complicated data types, e.g. with sets where means superset and means subset: a = set([1, 2, 3, 4]) b = set([2, 3, 4, 5]) a b # a is not a subset of b False a b # neither is it a superset False a == b # and they're not equal either False a b # but they do overlap: set([2, 3, 4]) In Python 2.x, __cmp__ is only used as a fall-back if the rich comparisons aren't defined. In Python 3.x, __cmp__ is gone: even if you define it, it won't be used. ___ 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] 2to3 conversion
On Friday 01 July 2011 14:05:22 Steven D'Aprano wrote: Oh my, that's hilarious. Sorry folks, nothing to see here... I accidentally clicked on an unread email from 2010 (!!!) and thought it had just come in. I'm glad that my eyes hadn't mislead me that much!! I was trying to find the original. Lisi ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] The Card Game
Christopher King wrote: Sorry, I haven't upgraded to 3 yet. No need to apologise for that! Python 2.7 will be around a long time yet. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem reading script
Lisi wrote: On Friday 01 July 2011 14:26:07 Steven D'Aprano wrote: If they look the same to you, then you need to increase your font size, change to a programmers font, or possible clean your glasses :) Thanks for the reply, Steven. Suggestions for a programmers font gratefully received. Here are some links I found useful: http://www.codinghorror.com/blog/2007/10/revisiting-programming-fonts.html http://damieng.com/blog/2008/05/26/envy-code-r-preview-7-coding-font-released http://www.kuro5hin.org/story/2004/12/6/11739/5249 http://www.ms-studio.com/FontSales/anonymous.html http://www.levien.com/type/myfonts/inconsolata.html This link astonishes me: http://www.sitepoint.com/top-10-programming-fonts/ How can anyone claim that Arial is a good programming font? Or even a good font for on-screen work at all? It has to be said that Arial does look reasonably good printed out, but on the low resolution of computer monitors, it's garbage. rn and m are virtually indistinguishable in Arial, which essentially disqualifies it as a programmer font. But it would be useful to know a specific programmer's font for when I am having difficulty seeing this particular distinction. I am used to having to look at just one word in a different font to distinguish between I and l (which currently look identical to me), where the context doesn't help. All I have to do now is work out/ look up what '' means!! '' is the empty string, the same as . In Python, single quotes and double quotes have the same meaning. That allows you to embed one inside the other without escaping: # Don't do this: s = He said, \Waiter, there is a fly in my soup!\ # Instead do this: s = 'He said, Waiter, there is a fly in my soup!' -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem reading script
Lisi lisi.re...@gmail.com wrote Suggestions for a programmers font gratefully received. I generally use Courier. Its ugly and old fashioned but it clearly shows the differences between i,l, | and 1 and '' and and between ' and ` etc. and spaces are big enough to see clearly. :-) But I could copy and paste to a WP Never read code in a word processor. Use a proper programmer's editor (and there are loads, most free, each with its supporters) like: vim, emacs, scite, Eclipse, etc Not only will the code be clearer with syntax colouring etc but you will have a lot of cursor movement and text operations that you don't get in a word processor (like commenting out a block, or folding/hiding a block inside a loop, auto indenting etc, etc) 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] problem reading script
Excerpts from Alan Gauld's message of Fri Jul 01 13:03:40 -0400 2011: Lisi lisi.re...@gmail.com wrote Suggestions for a programmers font gratefully received. I generally use Courier. Its ugly and old fashioned but it clearly shows the differences between i,l, | and 1 and '' and and between ' and ` etc. I use and love inconsolata[0], it's a great font for programming, and looks great as well (both on screen and off). [0] - http://www.levien.com/type/myfonts/inconsolata.html -- Corey Richardson Those who deny freedom to others, deserve it not for themselves -- Abraham Lincoln ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem reading script
On 01-Jul-11 10:56, Corey Richardson wrote: Excerpts from Alan Gauld's message of Fri Jul 01 13:03:40 -0400 2011: I use and love inconsolata[0], it's a great font for programming, and looks great as well (both on screen and off). I like inconsolata and Envy Code R, although just to be weird I tried using an old OCR font and kind of got to like that too. A little weird but the glyphs are certainly distinct :) -- Steve Willoughby / st...@alchemy.com A ship in harbor is safe, but that is not what ships are built for. PGP Fingerprint 4615 3CCE 0F29 AE6C 8FF4 CA01 73FE 997A 765D 696C ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Thank you. Was: Re: problem reading script
Thank you all for such a lot of very helpful replies. I have been looking through the recommended fonts and am pleasantly surprised by how clear, legible and well differentiated some of them are. I have been using Bitstream Vera Sans Mono in KWrite, which gives me all the colours and spacing and is very easy to read, but Bitstream Vera Sans Mono, like Bitstream Vera Sans itself, does not distinguish well between I and l, nor between '' and (which are in fact different, but the difference is noticeable only if you juxtapose them). I have already installed Inconsolata because there turned out to be a Debian package for it, so it took less than a minute to search for it - yes, it was there - and install it. And I have set KWrite to use it. Sadly, I am tied up all day tomorrow (it is late on Friday here) so I'll look into the other fonts on Sunday and work through the rest of your advice. I might even end up being able to code in Python - but if I do it will be because you have all hauled me over the fences. Lisi ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Blackjack Betting
I was able to get the program started without errors now. What is left now is to: Having the stash change after winning and losing. No matter what, the value in stash stays the same. The conditional statement I made which prevents players with no money from playing is dependent on this. After each game when I choose to play again, the betting options do not come up again before the cards are drawn. Apply the betting option to more than one player the same way each player can choose to hit. I think the key involves modifying the init function in class BJ_Game, where it adds the number of players and names. http://old.nabble.com/file/p31977263/blackjackbetting.py blackjackbetting.py Emile van Sebille wrote: On 7/1/2011 12:51 AM Andre Engels said... In this case, the error message says: NameError: global name 'bet' is not defined Note use of the term global? That means, at some time at the program, it is told to do something with 'bet', but there is no variable bet. And when does that happen? That too is told: at line 124, which says: bet.stash -= bet.wager Go to that line and read your code yourself - what is this 'bet' of which the stash is to be lessened by its wager? Have you told your program that this is the value of the variable 'bet'? Where and how? Further, because global is used, it tells you that 'bet' is not in the local scope, nor in the global scope. Python's general scoping resolution rule is local-global-builtin. So bet, wherever you think it may be defined, lives in a different namespace. See http://docs.python.org/tutorial/classes.html Emile ___ 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/Blackjack-Betting-tp31966195p31977263.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] Blackjack Betting
Also I must be doing something wrong if I have to enter a bet = Bet() into each function where it is used. I tried putting Bet into the other classes' arguments but it did not have any effect. Emile van Sebille wrote: On 7/1/2011 12:51 AM Andre Engels said... In this case, the error message says: NameError: global name 'bet' is not defined Note use of the term global? That means, at some time at the program, it is told to do something with 'bet', but there is no variable bet. And when does that happen? That too is told: at line 124, which says: bet.stash -= bet.wager Go to that line and read your code yourself - what is this 'bet' of which the stash is to be lessened by its wager? Have you told your program that this is the value of the variable 'bet'? Where and how? Further, because global is used, it tells you that 'bet' is not in the local scope, nor in the global scope. Python's general scoping resolution rule is local-global-builtin. So bet, wherever you think it may be defined, lives in a different namespace. See http://docs.python.org/tutorial/classes.html Emile ___ 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/Blackjack-Betting-tp31966195p31977301.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] (no subject)
# Blackjack # From 1 to 7 players compete against a dealer import cards, games class BJ_Card(cards.Card): A Blackjack Card. ACE_VALUE = 1 @property def value(self): if self.is_face_up: v = BJ_Card.RANKS.index(self.rank) + 1 if v 10: v = 10 else: v = None return v class BJ_Deck(cards.Deck): A Blackjack Deck. def populate(self): for suit in BJ_Card.SUITS: for rank in BJ_Card.RANKS: self.cards.append(BJ_Card(rank, suit)) class BJ_Hand(cards.Hand): A Blackjack Hand. def __init__(self, name): super(BJ_Hand, self).__init__() self.name = name def __str__(self): rep = self.name + :\t + super(BJ_Hand, self).__str__() if self.total: rep += ( + str(self.total) + ) return rep @property def total(self): # if a card in the hand has value of None, then total is None for card in self.cards: if not card.value: return None # add up card values, treat each Ace as 1 t = 0 for card in self.cards: t += card.value # determine if hand contains an Ace contains_ace = False for card in self.cards: if card.value == BJ_Card.ACE_VALUE: contains_ace = True # if hand contains Ace and total is low enough, treat Ace as 11 if contains_ace and t = 11: # add only 10 since we've already added 1 for the Ace t += 10 return t def is_busted(self): return self.total 21 class Bet(object): A Blackjack Gamble. # Values def __init__(bet, money = 10): stash = money # Betting options def betting(bet,stash): try: if stash 0: wager = int(input(\nHow much do you want to wager?: )) if wager bet.stash: int(input(\n You can only wager what you have. How much?: )) elif wager 0: int(input(\n You can only wager what you have. How much?: )) except ValueError: int(input(\n That's not valid! Choose a number: )) # Money Conditions def gamble(bet): if bet.stash = 0: print(\nYou are out of money! You're out of the game!) class BJ_Player(BJ_Hand): A Blackjack Player. def is_hitting(self): response = games.ask_yes_no(\n + self.name + , do you want a hit? (Y/N): ) return response == y def bust(self): print(self.name, busts.) self.lose() def lose(self): print(self.name, loses.) betting = Bet() stash = stash - wager print(stash) def win(self): print(self.name, wins.) bet = Bet() stash += wager print(stash) def push(self): print(self.name, pushes.) class BJ_Dealer(BJ_Hand): A Blackjack Dealer. def is_hitting(self): return self.total 17 def bust(self): print(self.name, busts.) def flip_first_card(self): first_card = self.cards[0] first_card.flip() class BJ_Game(object): A Blackjack Game. def __init__(self, names): self.players = [] for name in names: player = BJ_Player(name) self.players.append(player) self.dealer = BJ_Dealer(Dealer) self.deck = BJ_Deck() self.deck.populate() self.deck.shuffle() bet = 0 bet = Bet() bet.betting(stash) @property def still_playing(self): sp = [] for player in self.players: if not player.is_busted(): sp.append(player) return sp def __additional_cards(self, player): while not player.is_busted() and player.is_hitting(): self.deck.deal([player]) print(player) if player.is_busted(): player.bust() def play(self): # deal initial 2 cards to everyone self.deck.deal(self.players + [self.dealer], per_hand = 2) self.dealer.flip_first_card()# hide dealer's first card for player in self.players: print(player) print(self.dealer) # deal additional cards to players for player in self.players: self.__additional_cards(player) self.dealer.flip_first_card()# reveal dealer's first if not self.still_playing: # since all players have busted, just show the dealer's hand print(self.dealer) else: # deal additional cards to dealer print(self.dealer) self.__additional_cards(self.dealer) if self.dealer.is_busted(): # everyone still playing wins for player in self.still_playing: player.win()
