🌐 Mailman 3 February 2006 - Tutor - python.org

Problem wxPython
by Prabhakar K March 1, 2006

March 1, 2006

Hai to all, I installed ActivePython-2.4.1-247-win32-ix86 and wxPython2.6-win32-ansi-2.6.2.1-py2 in my system. When i Run a wxPython example.. geeting an Errors Traceback (most recent call last): File "E:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py", line 310, in RunScript exec codeObject in __main__.__dict__ File "F:\python\wx.py", line 1, in ? from wxPython.wx import * File "E:\Python24\lib\site-packages\wx-2.6-msw-ansi\wxPython\__init__.py", line 10, in ? import _wx File "E:\Python24\lib\site-packages\wx-2.6-msw-ansi\wxPython\_wx.py", line 3, in ? from _core import * File "E:\Python24\lib\site-packages\wx-2.6-msw-ansi\wxPython\_core.py", line 15, in ? import wx._core File "F:\python\wx.py", line 1, in ? from wxPython.wx import * ImportError: No module named wx Program Code: from wxPython.wx import * class MyApp(wxApp): def OnInit(self): frame = wxFrame(NULL, -1, "Hello from wxPython") frame.Show(true) self.SetTopWindow(frame) return true app = MyApp(0) app.MainLoop()

2 2

Re: [Tutor] Telnet to cisco device
by STREET Gideon (SPARQ) Feb. 28, 2006

Feb. 28, 2006

Thanks all for the replies. I got tcpwatch up and running and where the program was hanging is actually a page prompt, so now I just need to get the script to pass a space whenever that prompt comes up.... I'm surprised it worked and got to that point (that's a testament to the online tutorials). Fun and games :) -----Original Message----- From: Python [mailto:python@venix.com] Sent: Tuesday, 28 February 2006 11:05 PM To: STREET Gideon (SPARQ) Cc: Tutor Python Subject: Re: [Tutor] Telnet to cisco device On Tue, 2006-02-28 at 16:36 +1000, STREET Gideon (SPARQ) wrote: > tn.read_until('Username: ') #expected prompt after telnetting to the > router tn.write(user + '\r\n') #hopefully write username and pass > character return > Sending both \r and \n may be confusing things. I'd recommend using tcpwatch.py http://hathawaymix.org/Software/TCPWatch to monitor a telnet session that works. That way you will have a collection of exact prompts available to build your script. -- Lloyd Kvam Venix Corp This e-mail (including any attachments) may contain confidential or privileged information and is intended for the sole use of the person(s) to whom it is addressed. If you are not the intended recipient, or the person responsible for delivering this message to the intended recipient, please notify the sender of the message or send an e-mail to mailto:help.desk@ergon.com.au immediately, and delete all copies. Any unauthorised review, use, alteration, disclosure or distribution of this e-mail by an unintended recipient is prohibited. Ergon Energy accepts no responsibility for the content of any e-mail sent by an employee which is of a personal nature. Ergon Energy Corporation Limited ABN 50 087 646 062 Ergon Energy Pty Ltd ABN 66 078 875 902

1 0

Re: [Tutor] Unexpected Behavior in unittest
by Carroll, Barry Feb. 28, 2006

Feb. 28, 2006

Danny: I wish it were that simple. 'test3.py' is the name of the file containing the test case class. I left the invocation out of my output excerpt. It should look like this: >>>>>>>>>>>>>>>>>>>>>>>> J:\My Documents\Projects\Mongoose\symgen\test3.py F ====================================================================== FAIL: test_cs (__main__.cs_tryout) ---------------------------------------------------------------------- Traceback (most recent call last): File "J:\My Documents\Projects\Mongoose\symgen\test3.py", line 25, in test_cs <<<snip>>> FAILED (failures=1) >>>>>>>>>>>>>>>>>>>>>>>> BTW the other code excerpt was from a file named 'test1.py' in the same directory. Regards, Barry barry.carroll(a)psc.com 541-302-1107 ________________________ We who cut mere stones must always be envisioning cathedrals. -Quarry worker's creed > -----Original Message----- > From: Danny Yoo [mailto:dyoo@hkn.eecs.berkeley.edu] > Sent: Tuesday, February 28, 2006 2:08 PM > To: Carroll, Barry > Cc: tutor(a)python.org > Subject: Re: [Tutor] Unexpected Behavior in unittest > > > > In this case, the assignment to lg.cs failed. > > >>>>>>>>>>>>>>>>>>>>>> > > F > > ====================================================================== > > FAIL: test_cs (__main__.cs_tryout) > > ---------------------------------------------------------------------- > > Traceback (most recent call last): > > File "J:\My Documents\Projects\Mongoose\symgen\test3.py", line 25, in > test_cs > > self.assertEqual(expect, lg.cs, msg) > > File "C:\PROGRA~1\Python23\lib\unittest.py", line 302, in > failUnlessEqual > > raise self.failureException, \ > > AssertionError: Generator cs is incorrect. > > Expected 2.5; got 1.0 > > > > Hi Barry, > > I think the bug here is less glamorous than you might expect. I'd > recommend rerunning the unit test again, and watch carefully about what > exactly you're running. > > It's strongly possible that you may be running the wrong test program: I > see a reference to a 'test3.py' there in the error message that dies on > the line: > > self.assertEqual(expect, lg.cs, msg) > > But, hunting through the class that you've shown us, I see no such line. > *grin* > > The simplest explanation is that you're not running the test program that > you think you're running. Double check that you mean to run 'test3.py', > as opposed to some other 'test*' program in your working directory. > > > Good luck! > > >

2 1

Unexpected Behavior in unittest
by Carroll, Barry Feb. 28, 2006

Feb. 28, 2006

Greetings: This is a fairly long-winded question. I beg your indulgence. I am writing unit tests for our bar code scanner test software, and I have encountered some results that I cannot explain nor get around. Here is the scenario. Our program implements a generator class for creating 'label' objects. Leaving out a lot of detail, the generator converts a text string into a list of floats (txtlst), along with other attributes. My unit tests verify that the 'label' has been constructed correctly. One of the generator class's attributes is the character separator (cs), a float which is inserted between the individual character representations in the label's txtlst. This value is set when the generator object is created (default is 1.0), and can be changed by a simple assignment at any time before the label object is generated. One of my tests verifies that, when cs is changed, the new value appears in the txtlst attribute for labels created after the change. To test this, I do the following: 1. create a generator object 2. check the cs value 3. create a label 4. check the cs values in txtlst 5. change the generator's cs value 6. check the new cs value 7. create a new label 8. check the cs values in the new txtlst The first code excerpt implements these steps outside the unittest framework. ########################################### #!/usr/bin/python2.3 from lblgen import * lg = lblgen(t = 'Any string here') print '\n\nlg.cs: %.1f' % lg.cs assert(1.0 == lg.cs) lbl = lg.generate() for x in lbl.txtlst[lbl.chlen::lbl.chlen]: assert(1.0 == x) lg.cs = 2.5 print '\n\nlg.cs: %.1f' % lg.cs assert(2.5 == lg.cs) lbl = lg.generate() for x in lbl.txtlst[lbl.chlen::lbl.chlen]: assert(2.5 == x) ########################################### As the output shows, the assignment to lg.cs succeeded and the proper value was found in txtlst (no exceptions thrown by the assert statements). >>>>>>>>>>>>>>>>>>>>>> lg.cs: 1.0 lg.cs: 2.5 >>>>>>>>>>>>>>>>>>>>>> The next excerpt does the same steps inside the unittest framework. ########################################### #!/usr/bin/python2.3 from lblgen import * import unittest class cs_tryout(unittest.TestCase): def test_cs(self): lg = lblgen(t = 'Any string here') msg = ('Generator cs is incorrect.\nExpected %3.1f; got %3.1f' % (1.0, lg.cs)) self.assertEqual(1.0, lg.cs, msg) lbl = lg.generate() msg = 'txtlst entry %d is incorrect.\nExpected %3.1f; got %3.1f' for ndx, got in enumerate(lbl.txtlst[lbl.chlen::lbl.chlen]): self.assertEqual(1.0, got, msg % (ndx, 1.0, got)) lg.cs = 2.5 msg = ('Generator cs is incorrect.\nExpected %3.1f; got %3.1f' % (2.5, lg.cs)) self.assertEqual(2.5, lg.cs, msg) lbl = lg.generate() msg = 'txtlst entry %d is incorrect.\nExpected %3.1f; got %3.1f' for ndx, got in enumerate(lbl.txtlst[lbl.chlen::lbl.chlen]): self.assertEqual(2.5, got, msg % (ndx, 2.5, got)) if __name__=='__main__': unittest.main( ) ########################################### In this case, the assignment to lg.cs failed. >>>>>>>>>>>>>>>>>>>>>> F ====================================================================== FAIL: test_cs (__main__.cs_tryout) ---------------------------------------------------------------------- Traceback (most recent call last): File "J:\My Documents\Projects\Mongoose\symgen\test3.py", line 25, in test_cs self.assertEqual(expect, lg.cs, msg) File "C:\PROGRA~1\Python23\lib\unittest.py", line 302, in failUnlessEqual raise self.failureException, \ AssertionError: Generator cs is incorrect. Expected 2.5; got 1.0 ---------------------------------------------------------------------- Ran 1 test in 0.000s FAILED (failures=1) >>>>>>>>>>>>>>>>>>>>>> Can anyone tell me why it should fail here and succeed when unittest is not involved? I need to be able to verify that this and other attributes can be changed, and I don't want to abandon the unittest framework if I can avoid it. Thanks in advance for your help. Barry barry.carroll(a)psc.com 541-302-1107 ________________________ We who cut mere stones must always be envisioning cathedrals. -Quarry worker's creed

2 1

switch-case in python
by 铁石 Feb. 28, 2006

Feb. 28, 2006

I know this may seem to be stupid. but as I found that there's no switch-case control flow in python, an I just can't remember( or know) any method to make such a control flow.

4 3

Telnet to cisco device
by STREET Gideon (SPARQ) Feb. 28, 2006

Feb. 28, 2006

Hi all, I'm trying to get a script together to automate adding a couple of commands across a lot of cisco switches. Thought I'd try to get the script working correctly on one switch first. I've been reading a few online tutorials and have managed to kludge up the following (which fails where commented). Anyone able to advise where I may be going wrong? I'm sitting on a windows box here at work, otherwise I'd see what I could get expect to do. Thanks Gideon -------------------- import getpass import sys import telnetlib HOST = 'switch_name' # this is the hostname for device, to be changed to read from file when figure that out user = raw_input('Username: ') password = getpass.getpass() tn = telnetlib.Telnet(HOST) #make less typing for me tn.read_until('Username: ') #expected prompt after telnetting to the router tn.write(user + '\r\n') #hopefully write username and pass character return raw_input('ENTER to continue') # just to see if it makes this far # this is where the program appears to hang tn.read_until('Password: ') #expected prompt after putting in the username tn.write(password + '\r\n') tn.read_until(HOST + ">") #expected prompt is "hostname>" tn.write('enable \n') # go to exec mode tn.read_until('Password: ') #prompt to go to exec mode tn.write(password + '\n') tn.read_until(HOST + '#') #this should be the prompt after enable "hostname#" tn.write('sh int status' '\r\n') #run this command, read this from file when i figure out how tn.read_until(HOST + '#') #prompt once above command has finished running, useful when reading multiple commands tn.write('exit' '\R\N') #disconnect from the session print tn.read_all() #prints out something, maybe needs to be prior to "exit" command tn.close() This e-mail (including any attachments) may contain confidential or privileged information and is intended for the sole use of the person(s) to whom it is addressed. If you are not the intended recipient, or the person responsible for delivering this message to the intended recipient, please notify the sender of the message or send an e-mail to mailto:help.desk@ergon.com.au immediately, and delete all copies. Any unauthorised review, use, alteration, disclosure or distribution of this e-mail by an unintended recipient is prohibited. Ergon Energy accepts no responsibility for the content of any e-mail sent by an employee which is of a personal nature. Ergon Energy Corporation Limited ABN 50 087 646 062 Ergon Energy Pty Ltd ABN 66 078 875 902

3 2

RDT server for excel
by János Juhász Feb. 28, 2006

Feb. 28, 2006

Hi All, I would like to make a small RDT Server as COM Server in python that can be called from excel as =RDT("StockBalance.MyServer",,"100007") I'v tried to use google, but with not too much success. I just would like a simple sample. Yours sincerely, ______________________________ János Juhász

3 3

Re: [Tutor] Telnet to cisco device
by David Heiser Feb. 28, 2006

Feb. 28, 2006

The following works with the Cisco switch that I have available. Cisco 4006 with CatOS 6.2. It may not work with your model/OS or your switch may be configured differently. For instance, the default prompt terminates with "(enable)" so I used "tn.read_until(')')" instead of "tn.read_until(HOST + '#')". ---------------------------------------------- import getpass ##import sys import telnetlib ##HOST = 'switch_name' # this is the hostname for device, to be changed to read from file when figure that out HOST = '10.216.1.223' # this is the hostname for device, to be changed to read from file when figure that out ##user = raw_input('Username: ') """ My switch does not require a username """ ##password = getpass.getpass() print loginpassword = getpass.getpass('Login password: ') """ The login password and enable password may not be the same """ tn = telnetlib.Telnet(HOST) #make less typing for me ##tn.read_until('Username: ') #expected prompt after telnetting to the router ##tn.write(user + '\r\n') #hopefully write username and pass character return ##raw_input('ENTER to continue') # just to see if it makes this far # this is where the program appears to hang ##tn.read_until('Password: ') #expected prompt after putting in the username tn.read_until('password:') """ tn.read_until(':') may also work """ ##tn.write(password + '\r\n') tn.write(loginpassword + '\n') ##tn.read_until(HOST + ">") #expected prompt is "hostname>" tn.read_until(">") """ The prompt may not contain the HOST name """ tn.write('enable \n') # go to exec mode ##tn.read_until('Password: ') #prompt to go to exec mode tn.read_until(':') print enablepassword = getpass.getpass('Enable password: ') ##tn.write(password + '\n') tn.write(enablepassword + '\n') ##tn.read_until(HOST + '#') #this should be the prompt after enable "hostname#" tn.read_until(')') #this should be the prompt after enable "hostname#" ##tn.write('sh int status' '\r\n') #run this command, read this from file when i figure out how tn.write('sh int\n') """ This command works on a Cisco 4006 with CatOS 6.2 """ ##tn.read_until(HOST + '#') #prompt once above command has finished running, useful when reading multiple commands print print tn.read_until(')') ##tn.write('exit' '\R\N') #disconnect from the session tn.write('exit \n') ##print tn.read_all() #prints out something, maybe needs to be prior to "exit" command ##tn.close() """ I don't think you need this """ -----Original Message----- From: tutor-bounces(a)python.org [mailto:tutor-bounces@python.org] On Behalf Of STREET Gideon (SPARQ) Sent: Monday, February 27, 2006 11:36 PM To: tutor(a)python.org Subject: [Tutor] Telnet to cisco device Hi all, I'm trying to get a script together to automate adding a couple of commands across a lot of cisco switches. Thought I'd try to get the script working correctly on one switch first. I've been reading a few online tutorials and have managed to kludge up the following (which fails where commented). Anyone able to advise where I may be going wrong? I'm sitting on a windows box here at work, otherwise I'd see what I could get expect to do. Thanks Gideon -------------------- import getpass import sys import telnetlib HOST = 'switch_name' # this is the hostname for device, to be changed to read from file when figure that out user = raw_input('Username: ') password = getpass.getpass() tn = telnetlib.Telnet(HOST) #make less typing for me tn.read_until('Username: ') #expected prompt after telnetting to the router tn.write(user + '\r\n') #hopefully write username and pass character return raw_input('ENTER to continue') # just to see if it makes this far # this is where the program appears to hang tn.read_until('Password: ') #expected prompt after putting in the username tn.write(password + '\r\n') tn.read_until(HOST + ">") #expected prompt is "hostname>" tn.write('enable \n') # go to exec mode tn.read_until('Password: ') #prompt to go to exec mode tn.write(password + '\n') tn.read_until(HOST + '#') #this should be the prompt after enable "hostname#" tn.write('sh int status' '\r\n') #run this command, read this from file when i figure out how tn.read_until(HOST + '#') #prompt once above command has finished running, useful when reading multiple commands tn.write('exit' '\R\N') #disconnect from the session print tn.read_all() #prints out something, maybe needs to be prior to "exit" command tn.close() This e-mail (including any attachments) may contain confidential or privileged information and is intended for the sole use of the person(s) to whom it is addressed. If you are not the intended recipient, or the person responsible for delivering this message to the intended recipient, please notify the sender of the message or send an e-mail to mailto:help.desk@ergon.com.au immediately, and delete all copies. Any unauthorised review, use, alteration, disclosure or distribution of this e-mail by an unintended recipient is prohibited. Ergon Energy accepts no responsibility for the content of any e-mail sent by an employee which is of a personal nature. Ergon Energy Corporation Limited ABN 50 087 646 062 Ergon Energy Pty Ltd ABN 66 078 875 902

1 0

New Tutorial topic available
by Alan Gauld Feb. 28, 2006

Feb. 28, 2006

I've just uploaded the latest tutorial topic covering inter-process communications. It covers pipes and the use of fork(). Enjoy, as ever feedback is welcomed. Alan G Author of the learn to program web tutor http://www.freenetpages.co.uk/hp/alan.gauld

3 2

Converting MAC address . Need Help
by Sudarshana KS Feb. 28, 2006

Feb. 28, 2006

Hi, I am using scapy for writing a dhcp client. The problem i am facing is the mac address i have is in the form 00:11:22:33:44:55 need to convert to '\x00\x11\x22\x33\x44\x55' Please help me out with this problem. The chaddr field in dhcp ( SCAPY) requires '\x00\x11\x22\x33\x44\x55' format. I want this to be assinged through variables. Please let me know if this i doable. Thanks in advance, Sudarshana K S

3 4