🌐 Mailman 3 June 2011 - Tutor - python.org

Wave module
by Alex Krycek Feb. 12, 2015

Feb. 12, 2015

Hello, I'm trying to join two .wav files with the wave module. But when I try to use wave.open(filename, "rb") I receive the following error: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "F:\PortablePython1.0\lib\wave.py", line 483, in open return Wave_read(f) File "F:\PortablePython1.0\lib\wave.py", line 162, in __init__ self.initfp(f) File "F:\PortablePython1.0\lib\wave.py", line 143, in initfp self._read_fmt_chunk(chunk) File "F:\PortablePython1.0\lib\wave.py", line 264, in _read_fmt_chunk raise Error, 'unknown format: %r' % (wFormatTag,) wave.Error: unknown format: 85 I read somewhere that there are various wave formats, only some supported by Python. Is this true? If so, is there any way I can convert my wave files into a supported kind? Thanks!

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unicode help
by Marilyn Davis Nov. 14, 2012

Nov. 14, 2012

Hi, I'm still on Python 2.6 and I'm trying to work some unicode handling. I've spent some hours on this snippet of code, trying to follow PEP 0263, since the error tells me to see it. I've tried other docs too and I am still clueless. The code works, except for the comment at the end. I would be very grateful for some help. #!/usr/bin/env python '''Unicode handling for 2.6. ''' class Currency(float): def __str__(self): value = self.__class__.symbol + float.__str__(self) return value class Yen(Currency): symbol = unichr(165) class Pound(Currency): symbol = unichr(163) def main(): y = Yen(100) print unicode(y) p = Pound(100) print unicode(p) main() """ ¥100.0 £100.0 """

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Running .py files in shell
by Kevin Rapley Sept. 22, 2011

Sept. 22, 2011

Hello all, I am new to programming and have opted to learn Python as I hear it is a good first language. I am currently going through the exercises in 'How to Think Like a Computer Scientist: Learning with Python 2nd Edition'. I am running Mac OSX v10.6.4 Snow Leopard I am running Python 2.6.1 I have a couple of questions: 1. How do I execute .py files in the command line shell? I have my files in /Users/Kevin/python-exercises/ and am opening python in shell from that directory 2. How do I install GASP which is referenced in chapter 4? The instructions in this book are not complete. I have researched and found a reference on Stack Overflow which is contributed to by GASP programmers http://stackoverflow.com/questions/1024862/how-do-i-install-gasp-for-python… I have MacPorts installed and have attempted to install PyObjC, which is referenced as a prerequisite to PyGame and GASP. I get the following error when attempting to install PyObjC: sudo port install py-pyobjc Password: ---> Computing dependencies for py-pyobjc ---> Fetching py-pyobjc Error: Target org.macports.fetch returned: PyObjC 1.4 is for Mac OS X 10.4 and lower. On 10.5, use py-pyobjc2 instead. Log for py-pyobjc is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_python_py-pyobjc/main.log Error: Status 1 encountered during processing. It says to use py-objc2 instead, so I do so and get this error: sudo port install py-pyobjc2 Error: Target org.macports.activate returned: Image error: /opt/local/lib/python2.4/site-packages/modulegraph/__init__.py is being used by the active py-modulegraph port. Please deactivate this port first, or use 'port -f activate py-modulegraph-devel' to force the activation. Log for py-modulegraph-devel is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_python_py-modulegraph-devel/main.log Error: The following dependencies failed to build: py-py2app-devel py-modulegraph-devel Error: Status 1 encountered during processing. To report a bug, see <http://guide.macports.org/#project.tickets> I attempted to correct the issue by entering the following: port -f activate py-modulegraph-devel But it returned this error: Warning: Failed to open Portfile from registry for py-modulegraph-devel @0.7.2_0 ---> Activating py-modulegraph-devel Error: port activate failed: sqlite error: attempt to write a readonly database (8) This is as far as I have got with resolving this issue so far. All help and guidance will be greatly appreciated. Kevin Rapley

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Send binary/hex data to a TCP socket
by Tod Haren July 19, 2011

July 19, 2011

I need to send a server at the other end of a socket a 36 byte "frame", where each byte represents a specific field in the custom data structure. (If there are any Ham operators reading this, I'm talking about the AGW Packet Engine) The documentation for the server says to initialize each field to a binary zero(0x00). How do I get a binary zero in Python? The next step is to send this all to the server and subsequently receive a similarly formated frame. A very basic frame looks something like this(modified from documentation): |00 00 00 00 4D 00 00 00 00 00 00 00 00 00 00 00 |....M........... |00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................ |00 00 00 00 |.... My problem is that hex(0) return '0x0' and hex(ord('M')) returns '0x4d'. If I concatonate these all together then the socket receives 109 bytes instead of 36. The documentation examples are in C++, so they are little help to me. The examples make use of the MoveMemory function for building the frames, but I'm clueless what that does. Pseudo code for the frame above: l = [] for i in xrange(36): l.append(hex(0)) l[4]=hex(ord('M')) d='' d=d.join(l) #I need some other data type to send besides a string! sock.send(d) #send the 36 bytes to the socket Any pointers or references would be greatly appreciated.

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Blackjack Betting
by Vincent Balmori July 1, 2011

July 1, 2011

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.

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War: The Card Game
by Vincent Balmori July 1, 2011

July 1, 2011

I am working on the card game of war challenge where each player is given a single card and the highest value wins. I keep getting a Type Error since for the moment since the values of the cards cannot be compared due to their types. I am thinking of creating a Card_Value class that will give each rank and suit a certain value. If there is also a more elegant way of handling some of the code in the main section that will be welcome. http://old.nabble.com/file/p31961149/war.py war.py -- View this message in context: http://old.nabble.com/War%3A-The-Card-Game-tp31961149p31961149.html Sent from the Python - tutor mailing list archive at Nabble.com.

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2to3 conversion
by Zubin Mithra July 1, 2011

July 1, 2011

Hey everyone, I was running 2to3 on a particular file and I got the following traceback( http://paste.pocoo.org/show/223468/). The file which I was attempting to convert can be viewed here( http://paste.pocoo.org/show/223469/). Any pointers on what needs to be done? Thanks in advance, Zubin

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Copying Files
by gagnrath＠verizon.net June 30, 2011

June 30, 2011

I was using glob and shutil to copy logs from one location to another successfully, however, I have run into a snag when trying to copy a directory. Not sure how to fix this. Current Code is as follows: for file in glob.glob("/drbd1/monitorcenter/Apps/WEB-INF/*"): #This line is holding up the script due to copying a directory and not a single file shutil.copy(file, path_2_b_2) Any ideas?

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Python GUI
by David Merrick June 30, 2011

June 30, 2011

# Guess My Number GUI # Create a story based on user input from tkinter import * import random class Application(Frame): """ GUI application that creates a story based on user input. """ def __init__(self, master): """ Initialize Frame. """ super(Application, self).__init__(master) self.grid() self.create_widgets() def create_widgets(self): """ Create widgets to get story information and to display story. """ # create instruction label Label(self, text = "Welcome to 'Guess My Number'!\n\nI'm thinking of a number between 1 and 100.\nTry to guess it in as few attempts as possible." ).grid(row = 0, column = 0, columnspan = 2, sticky = W) # create a label for body parts radio buttons Label(self, text = "Take a guess:" ).grid(row = 6, column = 0, sticky = W) self.numberEnt = Entry(self) self.numberEnt.grid(row = 6, column = 1, sticky = W) # create a submit button Button(self, text = "Click to see if you got it", command = self.testNumber ).grid(row = 7, column = 0, sticky = W) self.numberTxt = Text(self, width = 75, height = 10, wrap = WORD) self.numberTxt.grid(row = 8, column = 0, columnspan = 4) def testNumber(self): """ Fill text box with new story based on user input. """ # get values from the GUI # create the story guess = int(self.numberEnt.get()) tries = 1 while guess != the_number: if guess > the_number: number += "Lower..." else: number += "Higher..." guess = int(self.numberEnt.get()) tries += 1 # display the text self.numberTxt.delete(0.0, END) self.numberTxt.insert(0.0, number) number += "You guessed it! The number was" + the_number number += "And it only took you " + tries + " tries!\n" self.numberTxt.delete(0.0, END) self.numberTxt.insert(0.0, number) # main number = "" the_number = random.randint(1, 100) root = Tk() root.title("Mad Lib") app = Application(root) root.mainloop() *Output* Traceback (most recent call last): File "I:\Python\programs\guess_my_ numberChapter10.py", line 60, in <module> number += "You guessed it! The number was" + the_number NameError: name 'number' is not defined Any ides??????????? Is my code going to work apart from this problem????????????? -- Dave Merrick merrickdav(a)gmail.com Ph 03 3423 121 Cell 027 3089 169

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Zipping files and Mysql
by gagnrath＠verizon.net June 30, 2011

June 30, 2011

I am trying to write a script that will dump a mysql db and then zip the file. I do know about mysqldb, but I was wondering if there is anything native to the libraries that will allow me to do this without using a seperate piece. Then after I gather the DBs, I need to zip them. I wrote the following, but wanted to know if I am heading in the correct direction. zipfile.zipfile(/myfiles/my_db/, w, zip_stored)

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