Re: [Tutor] Pyserial and invalid handle
On 11/30/2010 10:37 AM, Walter Prins wrote: Hello John (snip) In any case, to fix it let's delete all instances of pySerial and then install it again, as follows: 1.) Open up your Python site-packages folder in Windows Explorer, e.g. open up: E:\Python27\lib\site-packages 2.) Delete any folder named serial that you may see. 3.) Delete any *file* name pyserial*.* that you may see, probably you'll see pyserial-2.4-py2.7.egg, there may also be an info file. 4.) Open up a Python shell and confirm that you can't import pyserial anymore (e.g. import serial fails with e.g. ImportError: No module named serial. If it still imports then you still have some vestiges of the existing pyserial installation left over. 5.) After confirming the previous versions are gone, please try reinstalling it again from scratch. (E.g. extract source to some suitable place and run python setup.py install from there, which copies the required files into site-packages etc.) 6.) After installing, confirm import serial works again, then try your test again. Apologies again for adding to the confusion, and hopefully we're getting closer. :-( Walter Hi, Walter - I did the above and then got this: import serial Traceback (most recent call last): File pyshell#0, line 1, in module import serial File E:\Python27\lib\site-packages\serial\__init__.py, line 18, in module from serialwin32 import * File E:\Python27\lib\site-packages\serial\serialwin32.py, line 9, in module import win32file # The base COM port and file IO functions. ImportError: No module named win32file I guess that file was included in 2.5 but not in 2.4? Thanks, John ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Pyserial and invalid handle
On 11/30/2010 6:23 PM, Walter Prins wrote: Hello John, (snip) Apparently so. Well, win32file is part of the PyWin32 package, which are a set of modules that wrap many Windows API's. I'm not sure why it was't/isn't required for PySerial 2.5 or whether as you say perhaps this module is included in PySerial2.5 and isn't in 2.4. But whatever the case may be, suffice it to say I've reproduced your issue on my Win7 64bit box, and then resolved it by installing the PyWin32 modules. It's probably a good idea to install this package anyway -- if you're working on Windows the PyWin32 modules are very useful - they basically wrap and makes available a shedload of Windows specific API's to Python. (Many people working with Python on Windows almost automatically would install this, it's also why i didn't run into this issue in the first place as I already had PyWin32 installed prior to testing my suggestion. Sorry.) Anyway. To download and install PyWin32, go here: http://ur.ly/vLwv Presumably you want the AMD64 (64 bit) Py2.7 version. Install it then try your test again. Fingers crossed. ;) Walter Hi, Walter - I got pywin32-214.win32-py2.7.exe because I have the Intel i7 (I'm guessing that the AMD versions are for the AMD processor). However, all of the exe offerings have the same Python not found in registry problem that started this whole thing. So, since the only source module available is pywin32-214.zip, I got it and installed it. It does not work, maybe because I'm using Python 2.7 and the zip is for 3.2. I really appreciate all the time you have put into my problems, Walter. Thank you. Cheers, John ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Pyserial and invalid handle
On 11/30/2010 7:27 PM, Adam Bark wrote: On 01/12/10 01:00, John Smith wrote: Hi, Walter - I got pywin32-214.win32-py2.7.exe because I have the Intel i7 (I'm guessing that the AMD versions are for the AMD processor). However, all of the exe offerings have the same Python not found in registry problem that started this whole thing. So, since the only source module available is pywin32-214.zip, I got it and installed it. It does not work, maybe because I'm using Python 2.7 and the zip is for 3.2. I really appreciate all the time you have put into my problems, Walter. Thank you. Cheers, John Actually, AMD 64 is now the standard x86-64. It was originally designed by AMD because intel were making their Itanium thing but that didn't go so well. Anyway if you're running 64 bit windows that's probably why the 32-bit python install is having a problem. Download the version Walter suggested and you should be good to go. Yes! I have gone no farther than to say ser.read() knowing that nothing is attached to the port and expected a delay of 5 seconds. It now does that, so I have a clue that it is working. I had no idea that the AMD thing was now standard. Thanks for that. I also found that the file Walter recommended did install from the exe while the non-AMD file did not due to the registry thing. Wow! All I can say is thanks to everybody for the help. Now I need to start trying to get a modem to talk to me. By the way, the whole purpose of doing this is to communicate with some test instruments via GPIB/HPIB to automate some testing that is time consuming. The last time I did this (using a BASIC program), it took about 45 minutes (not due to BASIC, but due to instrument response time). I was able to start the test, go to lunch, then analyze the data when I returned. Thanks again for the help. Cheers, John ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Pyserial and invalid handle
On 11/28/2010 8:06 PM, Walter Prins wrote: John, (snip stuff) Ugh, you're probably not going to like this. I've done some googling and it appears this may be a 64-bit issue with the ctypes module... apparently 64-bit ctypes can only import 64-bit libraries. See here: http://ur.ly/vSMQ Then again, it also seems to be an open issue on the PySerial bug tracker: http://ur.ly/vZNL Note, the above ticket suggests that PySerial 2.4 works ok (impliedly even on 64-bit XP, so I imagine also on Windows 7.) You should be able to try this out by downloading the 2.4 version instead and installing it in the same way you did the 2.5 version. In any case, it might be an idea to post a report/add a comment to that bug report as well to maybe help get this issue resolved. Cheers, Walter Hi, Walter - Thanks for all the research. This was my second attempt at installing the 2.4 version. I did it thus: E:\Python27\pyserial-2.4..\python setup.py install standart distutils running install running build running build_py creating build creating build\lib creating build\lib\serial copying serial\serialcli.py - build\lib\serial copying serial\serialjava.py - build\lib\serial copying serial\serialposix.py - build\lib\serial copying serial\serialutil.py - build\lib\serial copying serial\serialwin32.py - build\lib\serial copying serial\sermsdos.py - build\lib\serial copying serial\__init__.py - build\lib\serial running install_lib running install_egg_info Removing E:\Python27\Lib\site-packages\pyserial-2.4-py2.7.egg-info Writing E:\Python27\Lib\site-packages\pyserial-2.4-py2.7.egg-info E:\Python27\pyserial-2.4 But, when I tried it in Python, I got the same as before: import serial ser = serial.Serial(0, timeout = 1) ser Serialid=0x225c240, open=True(port='COM1', baudrate=9600, bytesize=8, parity='N', stopbits=1, timeout=1, xonxoff=False, rtscts=False, dsrdtr=False) ser.read() Traceback (most recent call last): File pyshell#3, line 1, in module ser.read() File E:\Python27\lib\site-packages\serial\serialwin32.py, line 236, in read raise SerialException(ReadFile failed (%s) % ctypes.WinError()) SerialException: ReadFile failed ([Error 6] The handle is invalid.) Cheers, John ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Pyserial and invalid handle
On 11/29/2010 4:20 PM, Emile van Sebille wrote: On 11/29/2010 1:44 PM John Smith said... But, when I tried it in Python, I got the same as before: import serial ser = serial.Serial(0, timeout = 1) out of curiosity, if you change the timeout above to 5 ser Serialid=0x225c240, open=True(port='COM1', baudrate=9600, bytesize=8, parity='N', stopbits=1, timeout=1, xonxoff=False, rtscts=False, dsrdtr=False) ser.read() ... does the delay before printing the traceback below take about 5 seconds? No. There is no delay regardless of the timeout setting. John ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Pyserial and invalid handle
On 11/29/2010 5:56 PM, Emile van Sebille wrote: (snip) Hmmm... any chance you don't have administrative rights on the account performing this? I never got to Win7 (having stopped at XP) but I know it's got a reputation for excessive permission asking. You're right about that. It's like Win7 is paranoid. But, it tells me when I need to supply administrative permission. Some day I'll find the button that tells the system that nobody else uses this computer and to shut up and get on with it. Otherwise, I'd take this up on the main list. Chris Liechti, the [author|current maintainer|significant contributor] of pyserial monitors that list and would probably be interested in diagnosing what you're describing. You could also ask him as per the 'send me a message' link on his sourceforge page at http://sourceforge.net/sendmessage.php?touser=403744 Emile I'll consider that, Emile. First, though, I would like to hear from Walter again after my last post. Thanks for your suggestions. Cheers, John ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Pyserial and invalid handle
On 11/29/2010 9:41 PM, Rance Hall wrote: On Mon, Nov 29, 2010 at 8:21 PM, John Smithjocj...@verizon.net wrote: On 11/29/2010 5:56 PM, Emile van Sebille wrote: (snip) Hmmm... any chance you don't have administrative rights on the account performing this? I never got to Win7 (having stopped at XP) but I know it's got a reputation for excessive permission asking. You're right about that. It's like Win7 is paranoid. But, it tells me when I need to supply administrative permission. Some day I'll find the button that tells the system that nobody else uses this computer and to shut up and get on with it. Just so you know, Its called User Account Control or UAC. Google for disabling UAC on Windows 7 and you can find a tutorial or two on how to make your computer shut up and get on with it. Hey, thanks Rance. The info is appreciated. Cheers, John ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Pyserial and invalid handle
Can anybody tell me why the handle below is invalid? I'm running Win7.
TIA,
John
Python 2.7 (r27:82525, Jul 4 2010, 07:43:08) [MSC v.1500 64 bit
(AMD64)] on win32
Type copyright, credits or license() for more information.
import serial
ser = serial.Serial('com1', timeout = 5)
x = ser.read()
Traceback (most recent call last):
File pyshell#2, line 1, in module
x = ser.read()
File E:\Python27\lib\site-packages\serial\serialwin32.py, line 236,
in read
raise SerialException(ReadFile failed (%s) % ctypes.WinError())
SerialException: ReadFile failed ([Error 6] The handle is invalid.)
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Re: [Tutor] Fw: Installing Pyserial for Python27 on Win 7
Hi, Walter - Thanks to you, pyserial is installed and imports into Python. Not having double backslashes was the latest problem that you got me through. I am grateful for the support and education you have given me. Cheers, John ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Fw: Installing Pyserial for Python27 on Win 7
So, let's see Serial communications does not come with Python so a separate package has to be installed. Okay, but the pyserial Windows installer will not work in Windows 7 and will not be fixed. So, a source install is required. I _assume_ the source is the one that is a tar.gz thingy. Since Windows will not handle the unpacking of that, I have to install a decompressor/unpacker to do it. Then I can finally get around to installing the serial package. Maybe. Unless I run into a similar problem because of Win 7 or because pyserial is 32-bit. I think it is better that I stop now before I install a bunch of extra applications that I need only to install one or two Python modules. I like Python itself. Very powerful. But I guess I'll look for some other language which provides the features I need without the hassle. Thanks again for your help. Cheers, John On 11/22/2010 6:18 PM, Emile van Sebille wrote: On 11/22/2010 3:05 PM John Smith said... Hi, Emile - Install from sources? What is that? see http://pyserial.sourceforge.net/pyserial.html#installation the From Source section. I'm not sure what else may be required but it should help get you started. Emile I searched for that phrase but did not find anything I could understand. My shortcoming, perhaps. Thanks for your reply. John On 11/22/2010 4:02 PM, Emile van Sebille wrote: See http://sourceforge.net/tracker/index.php?func=detailaid=2921957group_id=46487atid=446302 where it's explained that this bug won't get fixed, but that you can install from sources. Emile On 11/22/2010 1:08 PM ALAN GAULD said... Forwarding to the list Please send list mail to tutor@python.org not tutor-owner... - Forwarded Message From: John Smithjocj...@verizon.net To: tutor-ow...@python.org Sent: Monday, 22 November, 2010 19:29:37 Subject: Installing Pyserial for Python27 on Win 7 My OS is Win 7. I have the 64-bit Python27 installed and it works well. I want to be able to do serial communications. I downloaded Pyserial, unfortunately in 32 bit release only, and I cannot install it. When I attempt the installation, it says No Python installation found in the registry and I cannot continue. 1) Does a 64-bit release of Pyserial exist? 2) Will the 32-bit release of Pyserial work with my OS somehow? 3) If the answer is Yes to #2, how do I get past my problem? Thanks in advance for help. Cheers, John ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
