🌐 Mailman 3 April 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. 30, 2014

Jan. 30, 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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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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VirutalEnv not working on Ubuntu server 9.10
by Marco Mistroni May 2, 2012

May 2, 2012

HI all i have a VPS which is running Ubuntu server 9.10 i have downloaded virtualenv 1.4.2 and installed it in a tmp directory i have created a environment for using googlemaps.. i am able to download googlemaps package, but when i activate the environment , run python and type import googlemaps i receive the following error ImportError: no module caleld googlemaps ..BUt i have just imported it using pip install. here's output of doing pip install googlemaps Downloadign googlemaps-1.0.2 ... Running setup.py install for googlemaps Successfully installed googlemaps yet, when i type pytyon and start to import googlemaps all i receive is an error that the package does not exist what am i missing? w/kindest regards marco

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question about listing variables defined since session started
by Comer Duncan May 1, 2012

May 1, 2012

Hi, I have a newbie type question. Say I have started a python (or ipython) session and have done some imports and have also defined some new variables since the session started. So, I have in my current namespace a bunch of things. Suppose I want to list just those variable names which have been defined since the session started but not include the names of the objects that who and whos will return. How to do that? In matlab, this is what the who returns, but in python I seem to always get a raft of things since I typically do import a bunch of things. Thanks for your suggestions. Comer

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Imaplib Select Fails while connecting folder(**Labelname) of gmail
by Anurag Maherchandani April 30, 2012

April 30, 2012

I am using imaplib module for connecting to Gmail Imap, and i am getting the below mentioned error. I am using select command to connect Labelname is **LabelName I Get this Error: resp, data = self._imap.select("**LabelName") File "/usr/lib/python2.6/imaplib.py", line 642, in select typ, dat = self._simple_command(name, mailbox) File "/usr/lib/python2.6/imaplib.py", line 1060, in _simple_command return self._command_complete(name, self._command(name, *args)) File "/usr/lib/python2.6/imaplib.py", line 895, in _command_complete raise self.error('%s command error: %s %s' % (name, typ, data)) imaplib.error: SELECT command error: BAD ['Could not parse command'] whereas if the Labelname is ** LabelName It successfully connects.

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Re: [Tutor] Python Variable Addition
by Alan Gauld April 30, 2012

April 30, 2012

On 30/04/12 11:00, Kapil Shukla कपिल शुक्‍ला wrote: > Viral > You should be doing this > > "Addition of two numbers is" + str(x+y) There is no need for str() since print implicitly calls string to convert objects to string format. Also the addition is not needed since print takes a comma separated list of arguments. So it would normally be: print 'Addition of above two numbers are : ', z > + operator works on same datatypes and Using addition on strings is quite expensive and there are usually better ways to do the same job. > int being one of the built in objects in python does not have a method z This however is true(ish - int is a type not strictly an object, except that everything in Python is an object, including types! :-) and it is the source of the original error message. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/

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Python Variable Addition
by viral shah April 30, 2012

April 30, 2012

Hi I'm new in the learning of python I want to make simple code for two variable addition Please help me in the following code *x = 12 print x y =20 print y z = x+y print 'Addition of above two numbers are : ' + int.z * when I run this same I got an error message : *AttributeError: type object 'int' has no attribute 'z' Please help me to solve the same error *-- Viral Shah IT Department, E-mail : shahviral.it(a)gmail.com Mobile : (+91) 9722312220

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