🌐 Mailman 3 December 2012 - 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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getUncPath(mappedDrive)
by Albert-Jan Roskam Jan. 31, 2014

Jan. 31, 2014

Hi, Is there a function that takes a file path with a mapped drive (z:\blah) and returns the associated UNC path (\\server\share\ding\dang\dong\blah)? I looked in os.path, but it doesn't seem to have this. The link below seems to be a solution (code in the bottom of the page), but I can't install win32com.client in the office :-( Is there any built-in function? http://stackoverflow.com/questions/2244767/python-check-network-map Thanks! Regards, Albert-Jan ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, a fresh water system, and public health, what have the Romans ever done for us? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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How to unpack python-dateutil-2.0.tar.gz
by Richard D. Moores Sept. 6, 2013

Sept. 6, 2013

Python 3.2.3 64 bit MS Windows 7 Home Premium 64-bit SP1 I see python-dateutil recommended here from time to time, so I thought I'd try it out. I downloaded python-dateutil-2.1.tar.gz from http://pypi.python.org/pypi/python-dateutil but have forgotten how to unpack a .tar.gz file. Please remind me. Thanks, Dick Moores

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invalid literal for int error in Game loop
by Ciaran Mooney Jan. 10, 2013

Jan. 10, 2013

HI All, Was hoping someone could help me with a problem I am having programming a game using pygame. I am trying to return a variable with a integer value defined by user input from a function. Basically the idea is to allow the player to select the level of difficulty by selecting from a choice of keys, each key corresponding too the number of frames per second. The function code is as follows: def difficultyLevel(): FPS = '' windowSurface = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT),pygame.FULLSCREEN) windowSurface.fill(BACKGROUNDCOLOUR) drawText('LEVEL OF PLAY', font3, windowSurface, (WINDOWWIDTH/6), (WINDOWHEIGHT/6)) drawText('B: Your an absoulute Begineer', font3, windowSurface, (WINDOWWIDTH/6)-100, (WINDOWHEIGHT/6)+100) drawText('M: Not Too Snazy', font3, windowSurface, (WINDOWWIDTH/6)-100, (WINDOWHEIGHT/6)+150) drawText('H: Deathwish' ,font3,windowSurface, (WINDOWWIDTH/6)-100, (WINDOWHEIGHT/6)+200) pygame.display.update() for event in pygame.event.get(): if event.type == QUIT: terminate() if event.type == KEYDOWN: if event.key == ord('b'): FPS = 30 elif event.key == ord('m'): FPS = 70 elif event.key == ord('h'): FPS = 120 return FPS The function is then called and FPS converted too a integer value in the main game loop as follows: topScore = 0 while True: #set up the game and all intial key and mouse movement values as false baddies = [] #baddies as a empy list score = 0 etc FPS = int(difficultyLevel()) FPS is then used within the game loop to allow for number of frames per second in: mainClock.tick(FPS) However I keep getting the following error: ValueError: invalid literal for int() with base 10: '' Please note I am a absolute beoingeer in programming and have had no formal education to date so please excuse anything I may of left out !! Thanks Ciaran

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(no subject)
by Dustin Guerri Jan. 9, 2013

Jan. 9, 2013

Hi there, I'm completely new to Python and to programming. I have the Python Launcher (v2.7.3) app installed on my system, and I'm running Mac OS X Mountain Lion. Does this mean I have Python itself installed ? Many thanks.

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Trouble importing Paramiko
by Ufuk Eskici Jan. 4, 2013

Jan. 4, 2013

My code is: import paramiko ssh = paramiko.SSHClient() ssh.connect('710.10.10.10', username='ufuk', password='ufuk') and saved this file as "ufo.py" on the desktop. I'm still getting error: >>> ================================ RESTART ================================ >>> Traceback (most recent call last): File "C:\Users\eufuesk\Desktop\ufo.py", line 1, in <module> import paramiko ImportError: No module named paramiko >>>

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how to struct.pack a unicode string?
by Albert-Jan Roskam Jan. 3, 2013

Jan. 3, 2013

Hi, How can I pack a unicode string using the struct module? If I simply use packed = struct.pack(fmt, hello) in the code below (and 'hello' is a unicode string), I get this: "error: argument for 's' must be a string". I keep reading that I have to encode it to a utf-8 bytestring, but this does not work (it yields mojibake and tofu output for some of the languages). It's annoying if one needs to know the encoding in which each individual language should be represented. I was hoping "unicode-internal" was the way to do it, but this does not reproduce the original string when I unpack it.. :-( # Python 2.6.4 (r264:75708, Oct 26 2009, 08:23:19) [MSC v.1500 32 bit (Intel)] on win32 import sys import struct greetings = \ [['Arabic', [1575, 1604, 1587, 1604, 1575, 1605, 32, 1593, 1604, 1610, 1603, 1605], 'cp1256'], # 'cp864' 'iso8859_6' ['Assamese', [2472, 2478, 2488, 2509, 2453, 2494, 2544], 'utf-8'], ['Bengali', [2438, 2488, 2488, 2494, 2482, 2494, 2478, 2497, 32, 2438, 2482, 2494, 2439, 2453, 2497, 2478], 'utf-8'], ['Georgian', [4306, 4304, 4315, 4304, 4320, 4335, 4317, 4305, 4304], 'utf-8'], ['Kazakh', [1057, 1241, 1083, 1077, 1084, 1077, 1090, 1089, 1110, 1079, 32, 1073, 1077], 'utf-8'], ['Russian', [1047, 1076, 1088,1072, 1074, 1089, 1090, 1074, 1091, 1081, 1090, 1077], 'utf-8'], ['Spanish', [161, 72, 111, 108, 97, 33], 'cp1252'], ['Swiss German', [71, 114, 252, 101, 122, 105], 'cp1252'], ['Thai', [3626, 3623, 3633, 3626, 3604, 3637], 'cp874'], ['Walloon', [66, 111, 110, 100, 106, 111, 251], 'cp1252']] for greet in greetings: language, chars, encoding = greet hello = "".join([unichr(i) for i in chars]) #print language, hello, encoding # prints everything as it should look endianness = "<" if sys.byteorder == "little" else ">" fmt = endianness + str(len(hello)) + "s" #https://code.activestate.com/lists/python-list/301601/ #http://bytes.com/topic/python/answers/546519-unicode-strings-struct-files #packed = struct.pack(fmt, hello.encode('utf_32_le')) #packed = struct.pack(fmt, hello.encode(encoding)) #packed = struct.pack(fmt, hello.encode('utf_8')) packed = struct.pack(fmt, hello.encode("unicode-internal")) print struct.unpack(fmt, packed)[0].decode("unicode-internal") # UnicodeDecodeError: 'unicode_internal' codec can't decode byte 0x00 in position 12: truncated input Thank you in advance! Regards, Albert-Jan ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, a fresh water system, and public health, what have the Romans ever done for us? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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Limitation of int() in converting strings
by boB Stepp Jan. 3, 2013

Jan. 3, 2013

>>> int('10.0') Traceback (most recent call last): File "<interactive input>", line 1, in <module> ValueError: invalid literal for int() with base 10: '10.0' >>> int("10") 10 It is apparent that int() does not like strings with floating-point formats. None of my books (as far as my flipping can tell) or the below built-in help clarify this: Help on int object: class int(object) | int(x[, base]) -> integer | | Convert a string or number to an integer, if possible. A floating | point argument will be truncated towards zero (this does not include a | string representation of a floating point number!) When converting a | string, use the optional base. It is an error to supply a base when | converting a non-string. Of course if I type int(float('10.0')) I get the desired 10 . So, I am guessing that to convert strings to integers with int() that the string must already be of integer format? What is the rationale for setting up int() in this manner? Thanks as I continue to puzzle over the fine points of the basics... boB

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another for loop question - latin square
by Brandon Merritt Dec. 31, 2012

Dec. 31, 2012

I am having trouble figuring out a solution after a couple hours now of playing with the code. I'm trying to make a latin square using the code below: scaleorder = int(raw_input('Please enter a number for an n*n square: ')) topleft = int(raw_input('Please enter the top left number for the square: ')) firstrow = range((topleft),scaleorder+1) count = 0 while count < 8: for i in firstrow: print i count += 1 firstrow[i+1] ----------------------------------------------------------------------- It seemed like I could make the for loop work by doing something like this: for i in firstrow: print i, i+2 but that obviously is not a solution either. Any ideas? Thanks, Brandon

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Re: [Tutor] help
by Mike G Dec. 30, 2012

Dec. 30, 2012

Hi Randy > I am an older newbie teaching myself Python programming. > Me too :) > My problem is I hear no system bell; the enter doesn't respond by quitting the program; > The problem with the program code the enter key hasn't worked in earlier programs. > > I appreciate any advice I may recieve with this coding glitch. > I copied the code into a blank .py file and ran it from cmd in Windows XP x86 using Python 273, it worked fine - including the beep. As well, hitting "Enter" exited the program. It sounds like (no pun intended) it may be how you're running the program. I would use a py file and run it using cmd - holler if you need help, you may if the path to Python isn't good to go. Mike

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