🌐 Mailman 3 June 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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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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group txt files by month
by questions anon Sept. 8, 2012

Sept. 8, 2012

I think what I am trying to do is relatively easy but can't get my head around how to do it. I have a list of txt files that contain daily rainfall for many years. I would like to produce a list that contains the year-month and the max, min and mean of rainfall for each month. My main question at this stage is how to group the files by each month for each year? They are set out like: r20110101.txt r20110102.txt r20110103.txt r20110104.txt r20110105.txt r20110106.txt r20110107.txt r20110108.txt r20110109.txt r20110110.txt r20110111.txt r20110112.txt r20110113.txt r20110114.txt r20110115.txt r20110116.txt r20110117.txt r20110118.txt and so on for each day for many years. so far I am able to open each file and calculate the max, min and mean for each file (see below) but not sure about grouping to monthly for each year. MainFolder=r"E:/Rainfalldata/" outputFolder=r"E:/test/" for (path, dirs, files) in os.walk(MainFolder): path=path+'/' for fname in files: if fname.endswith('.txt'): filename=path+fname f=np.genfromtxt(filename, skip_header=6) print f.max(), f.min(), f.mean() the ideal output would be something like: year-month max min mean 2010-12 100 0 50 2011-01 200 0 100 2011-02 50 0 25 any feedback will be greatly appreciated.

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Python and boot sequences
by Dave Wilder July 9, 2012

July 9, 2012

Hello, This is a general Python question, so I don't require specific answers on how to do it, but... Can a Python script be written that has the ability to stop a Linux device in the middle of a boot when a certain sequence occurs and then perform an action? For example, when I boot my switch (w/ Linux OS 2.7.3), I want to stop the boot when I see a series of asterisks. When I see this, I need to hit the <ESC><SHIFT><9> sequence. Then, I need to select a menu option (e.g. 1 to run a test or Q to quit and continue w/ the boot). Another example would be when doing a PXE boot, selecting the image to load when prompted during the reboot. I don't know enough about Python yet to know if that is something that Python can be used for or I am barking up the wrong tree. Thank You, Dave

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Seeking help with reading and writing files in Python
by Aristotle July 8, 2012

July 8, 2012

Hello, I am reading Tony Gaddis "Teach Python" book and I am having trouble with an assignment that asks me to read from one file and then write to another file. The problem is that the file to read from has not been created yet. Can anyone help me understand this instruction a little better? I am averaging an A in the course and would like to keep it. Below you will find the correspondence between the instructor and myself. ( Written Last to First) Thanks, Jim Hello Ms. H, I am still having trouble with using two text files. I cannot find any examples in Cha.7 text book or Code Examples. Would you please point me in the direction where I may find an example for this requirement? Thank You, Jim Hello Ms. H, The sequence of events that I am using now is to open a program that will gather gallons used from user, call a module to make calculations, use the info from the module to write info to a file named FinalProjectBill.txt. After that is done, I open another program that will read the info written to FinalProjectBill.txt I guess my confusion about the instructions is, if I should read from one file FinalProjectBill.txt first how does data get written to that file to begin with? Thank you for the great help. Jim From Instructor: You should read from one file (FinalProjectBill.txt) and then write to one (BranleyFinal.txt) with the results as we are learning file i/o (input/output) - The screen is fine to display results also, but in the real world, often times all processing is done by reading and writing to files (actually databases that are beyond the scope of this class) and nothing ever displays on the screen. You should not write to your input file. Make sense? From: Me Sent: Tuesday, June 26, 2012 5:54 AM To: Instructor Subject: Two txt files Hello Ms. H, I started writing the program yesterday and by the evening I had a WaterPayModule, an InputProgram, an OutputProgram and a text file named FinalProjectBill.txt. When I run the OutputProgram it gets input from the user, sends info to the WaterModule and receives some values that I use to write output to the hard drive file FinalProjectBill.txt. When I run the InputProgram it reads input from the hard drive text file FinalProjectBill.txt and prints it on the screen. My question is why do I need two text files FinalProjectBill.txt and BranleyJamesFinal.txt ? Thank you, Jim

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Pygame installation problems
by Osemeka Osuagwu July 4, 2012

July 4, 2012

Hi, I started learning Python recently, having only very little programming experience. I installed Pygame and tried using >import pygame to test the installation and got the following error in return; Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named pygame Please does this mean I didn't install pygame correctly? How do I get it to work. Thanks, eMeka. -- *We have enough for our need but not enough for our greed.*

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Script
by Amit Prasad July 4, 2012

July 4, 2012

Hello Sir, I want to write a script to replace hostname from /etc/hosts and /etc/sysconfig/network files. And the new hostname will be a new entry everytime. I mean everytime when i run the script and give a new hostname, it should be replaced with the old one. I am running out of time, please help me out, as i am new to scripting. Thanks

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Passing numeral result of a defined function to a named value
by Joseph Hines July 4, 2012

July 4, 2012

Hello. Sorry to bother you, but I'm self-teaching myself python, and having difficulty with a script I'm writing to auto-calc various derived stats for a PnP game I am hosting soon. I need to pass a numeral result of a defined function to a "named" value (not sure if that's what it's called) The offending segment of code is this: XP_Per_Level_Base = 20-int_mod > XP_Per_Level_Limit = 5 > try: > def XP_Per_Level_Calc(XP_Per_Level_Base, XP_Per_Level_Limit): > if XP_Per_Level_Base < XP_Per_Level_Limit: > return XP_Per_Level_Limit > else: > return XP_Per_Level_Base > XP_Per_Level = XP_Per_Level_Calc(XP_Per_Level_Base, XP_Per_Level_Limit) > except ValueError: > print "Script B0RK3D, Link Shall Come to Town." > print "send him a message at Link6746(a)gmail.com" #Calcs XP per Level# > If you need the whole script, I'd be glad to send it to you, just promise me not to divulge too many details of it (It's regarding a custom PnP system that I'm planning on releasing under the Open Gaming License, and I'd prefer not to risk it becoming a proprietary system for someone I don't know)

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VPYTHON
by Prajwal Niraula July 4, 2012

July 4, 2012

Hi, I am trying to learn VPython for more interesting simulation. I downloaded it from the website: www.vpython.org While I have Python 3.2.3 in my computer, and it seems no equivalent version for vpython is available. Besides when installing I had problem in which the installer would not recognise the location of python, even though it is located at C:\Python32. What should I be doing?

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