🌐 Mailman 3 September 2009 - 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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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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sftp get single file
by Matt Herzog June 22, 2011

June 22, 2011

Hello All. I need to use paramiko to sftp get a single file from a remote server. The remote file's base name will be today's date (%Y%m%d) dot tab. I need help joining the today with the .tab extension. Do I need globbing? example: 20090716.tab #!/usr/bin/env python import paramiko import glob import os import time hostname = 'sftp.booboo.com' port = 22 username = 'booboo' password = '07N4219?' # glob_pattern='*.tab' today = time.strftime("%Y%m%d") remotepath = today.tab localpath = '/home/data/text' if __name__ == "__main__": t = paramiko.Transport((hostname, port)) t.connect(username=username, password=password) sftp = paramiko.SFTPClient.from_transport(t) sftp.get(remotepath, localpath) t.close() -- I fear you speak upon the rack, Where men enforced do speak anything. - William Shakespeare

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cx_Oracle help
by Greg Lindstrom Jan. 6, 2011

Jan. 6, 2011

Hello, I'm trying to help out a friend and am stumped. Can you help me out? Thanks, --greg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - I will briefly explain the problem I am facing. I am using Oracle 9.2, Python 2.5 and I installed cx_Oracle- 4.3.1-win32-9i-py25 in Python. From python I tried following : >>> import cx_Oracle >>> myDsn = cx_Oracle.makedsn('ISCN47',1521,'AUBDBS01') >>> CONN = cx_Oracle.connect(myusr, mypwd, myDsn) Traceback (most recent call last): File "<pyshell#4>", line 1, in <module> conn = cx_Oracle.Connection('scott','tiger',myDsn) RuntimeError: Unable to acquire Oracle environment handle I have set the below environment variables too NLS_LANG: <snip>.WE8MSWIN1252 ORACLE_HOME: D:\Tools\oracle\ora92 ORACLE_SID: AUBDBS01 PYTHON_HOME: d:\Utility\Python25 PYTHONPATH: %PYTHON_HOME%\lib;%PYTHON_HOME%\DLLs;%PYTHON_HOME%\Lib\site-packages;%ORACLE_HOME%\bin LD_LIBRARY_PATH: %LD_LIBRARY_PATH%;D:\Tools\oracle\ora92\lib Not getting any idea where I am wrong? Regards, Kishore

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Tracking time
by Michael Key Jan. 6, 2010

Jan. 6, 2010

I am trying to develop a project tracking program that would allow you to track hours and minutes spent on several different projects and store he data in a database for printing. Any help would be appreciated. Mike

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Learning Python
by Fred P Dec. 13, 2009

Dec. 13, 2009

Hey Everyone, I am completely new at python, but not new to programming or scripting. I have a couple of years of LUA scripting experience, about a year of C++ classes, and used to be very efficient at c-shell scripting in unix. My question for you guys: 1) How do I get Started? 2) Recommend any specific Books? 3) Any online tutors/ forums that would benefit a newbie 4) Any online classes that teach python? I have taken online c++ courses, and found them helpful. I was hoping to find something for python. My main objective is to write scripts for the following type of applications File management, file copies/syncs/ compares Text manipulation - like parsing text files to replace or augment specific values Integration into current applications to write redundant routines and maybe some day plugins I am not even sure what else, but I do know that every time i think of something that we need at work, other people say, "That would be a good task for a python script" and I would eventually like to be able to do something about that. Thanks Fred

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Question about time.gmtime
by Eduardo Vieira Nov. 2, 2009

Nov. 2, 2009

Hello, I had a problem with a script yesterday that made me puzzled. My time zone is US Mountain Time. This script was running nice last week, but yesterday it reported the date of today instead So, yesterday at 5:20pm this line: hoje = time.strftime("%a, %b %d, %Y", time.gmtime()) Gave me this: "Tue, Sep 29, 2009" instead of "Mon, Sep 28, 2009" What's going on? Minutes ago, while I was investigating this I had this output: >>> time.gmtime() time.struct_time(tm_year=2009, tm_mon=9, tm_mday=29, tm_hour=14, tm_min=48, tm_sec=49, tm_wday=1, tm_yday=272, tm_isdst=0) >>> time.localtime() time.struct_time(tm_year=2009, tm_mon=9, tm_mday=29, tm_hour=8, tm_min=50, tm_sec=28, tm_wday=1, tm_yday=272, tm_isdst=1) I see there are 6 hours difference, but I'm sure the script ran before 6pm Should I simply modify my code to use localtime, instead? Why did it happen only yesterday? I'm using Windows XP Professional, and my clock says it's Tuesday, Sept. 29, 2009 and 9:10 AM Regards, Eduardo

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Handling missing fields in a csv file
by Eduardo Vieira Sept. 30, 2009

Sept. 30, 2009

Hello, I have a csv file, using the ";" as a delimiter. This file contains addresses. My problem is that some fields are missing in some rows and I would like to normalize the rows for a smoother import into Excel, for example. Here is an example. This is the header: Company;Telephone;Address;Prov;PCode While most of them have this header, some data would be like this: Abc blaba;403-403-4545;MB ---> missing address, city, and postal code Acme;123-403-4545;Winnipeg;MB; I think a good solution would be to add delimiter to represent empty fields: Abc blaba;403-403-4545;;;MB; -->missing address and postal code Acme;123-403-4545;;Winnipeg;MB; Fortunately the source has province names abbreviated (2 letters). I could also take into account a postal code, maybe: Given I have 2 simple functions: isProvince() isPostalCode(): How I would write to the proper fields once that was returned true? Province has to go to row[3], and PCode to row[4] right? Eduardo

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Not workin!
by Corey Richardson Sept. 30, 2009

Sept. 30, 2009

I got suggested to use this format for my code, as it was shorter and prettier. But It dun work! if wellness != ["Well","Fine","Good", "OK", "ok", "Ok", "Great", "Awesome", "Epic"]: print "Oh, I'm sorry you are not feeling well." areYouOk = raw_input("I guessed correct, right?") if areYouOk != ["yes", "yep", "yup", "yea"]: print "Oh, thats to bad. Things will be better" else : print "Oh, I'm glad your ok then!" It just prints the "Oh, I'm sorry you are not feeling well.", and then when you reply, it says "Oh, thats to bad. Things will be better"/ Ahhh! Why does it be do this? And there is no error, btw.

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Images, and other things.
by Corey Richardson Sept. 30, 2009

Sept. 30, 2009

I haven't looked into this, but could you make a real time image using python? I think it would be most hard.... Anyway, I am having trouble with int(). I am trying to int(raw_input("some number")), but it returns Traceback (most recent call last): File "C:/Users/Quick-Start/Documents/Python Doc's/Game_File", line 94, in <module> fatness = int(raw_input("How many candies do you want to eat? :")) TypeError: 'int' object is not callable Do I need to import a module or something? I am using 2.6.2, possibly upgrading to 3.x later...

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