Python 2.4 will be widespread in the world for some time to come - the final 2.4.x maintenance release went out in December, 2008. Since python is often used by system management tools, many linux distributions ship versions that are long in the tooth - I routinely run into 2.3 and even 2.2 on rhel systems. I don't think tashi needs to support every crusty old python out there, but 2.4.x and on seems reasonable given that the change is simple and it will let most potential users try tashi without having to upgrade python.
Dan On 1/8/09 8:58 AM, "Ryan, Michael P" <[email protected]> wrote: There are several places in the code that have the newer try/except/finally syntax. It is either necessary to replace all of them or to upgrade python. What versions of python are other people using in their environments? - Michael ________________________________ From: Daniel Mercer [mailto:[email protected]] Sent: Thursday, January 08, 2009 11:51 AM To: [email protected] Cc: KunWang Subject: Re: [question] getting tashi run smoothly Howdy, Prior to 2.5, to get try/except/finally behavior you need to nest two try blocks - one of the so-called 'python warts'. Here is a patch to client.py that ought to let it work with earlier pythons. Dan M. Index: client.py =================================================================== --- client.py (revision 732752) +++ client.py (working copy) @@ -162,21 +162,22 @@ sys.exit(-1) args = map(lambda x: eval(x), sys.argv[1:]) try: - res = f(*args) - if (os.getenv("USE_HTML_TABLES")): - try: - makeHTMLTable(res) - except: + try: + res = f(*args) + if (os.getenv("USE_HTML_TABLES")): + try: + makeHTMLTable(res) + except: + pprint(res) + else: pprint(res) - else: - pprint(res) - except TashiException, e: - print e.msg - exitCode = e.errno - except TypeError, e: - print e - print "\t" + getFunctionInfo(function) - exitCode = -1 + except TashiException, e: + print e.msg + exitCode = e.errno + except TypeError, e: + print e + print "\t" + getFunctionInfo(function) + exitCode = -1 finally: client._transport.close() sys.exit(exitCode) On 1/8/09 7:34 AM, "Ryan, Michael P" <[email protected]> wrote: I did a little more reading on the finally clause and it appears that it only started working in it's current form on python2.5. I installed CentOS 5.2 and I was able to get the same error message with python 2.4.3, but once I installed 2.5.4, the messages went away. Can you try running the following and report the version numbers? $ /usr/bin/env python $ /usr/bin/python If either reports 2.4.3, I think you only need to change the #! at the top of the file (client.py) to point to python2.5 - Michael ________________________________ From: Ryan, Michael P [mailto:[email protected]] Sent: Wednesday, January 07, 2009 5:54 PM To: [email protected] Cc: KunWang Subject: RE: [question] getting tashi run smoothly Those with_statement imports are unneccessary. I just committed a fix that removes them. Just for reference, I am using Python 2.5.2. Please try using trunk instead of the imported code (tashi/trunk instead of tashi/import/tashi-intel-r399). I'm not sure why "finally" would be considered a syntax error. I'm assuming you didn't modify the code once you checked it out. I'm currently downloading and installing CentOS 5 to test on and I will let you know if I am able to reproduce the error. The only other things I can think of checking are to revert to the older version of python now that the with imports are removed and to make sure you have identical files: $ md5sum ./trunk/src/tashi/client/client.py ./import/tashi-intel-r399/src/tashi/client/client.py de302c54d3236e468ba7c2e82d6ceafe ./trunk/src/tashi/client/client.py 7e9eabb435e989272a7a4d620f53f6ba ./import/tashi-intel-r399/src/tashi/client/client.py - Michael ________________________________ From: KunWang [mailto:[email protected]] Sent: Tuesday, January 06, 2009 7:37 PM To: Ryan, Michael P Cc: [email protected] Subject: RE: [question] getting tashi run smoothly Hello, Thanks for your help. I am using Xen on CentOS 5.0 . The default version of python is 2.4.3. Following is the log when I was trying to do "make" under tashi-intel-r399 directory. [r...@mvm tashi-intel-r399]# make Building tashi.services... File "./build.py", line 3 from __future__ import with_statement SyntaxError: future feature with_statement is not defined make: *** [src/tashi/services] Error 1 Then I installed newer version of Python(Python 2.5.4) The error happened in different place. [root@ mvm tashi-intel-r399]# make Building tashi.services... Generating Python code for 'services.thrift'... Copying generated code to 'tashi.services' package... Generatign Python code for 'messagingthrift'... Copying generated code to 'tashi.messaging.messagingthrift' package... Generating client symlinks... File "../src/tashi/client/client.py", line 163 finally: ^ SyntaxError: invalid syntax make: *** [bin/getInstances] Error 1 Does tashi require particular version of Python? By the way, thrift is available on my machine. Thanks again, Kun From: Ryan, Michael P [mailto:[email protected]] Sent: Monday, January 05, 2009 11:28 AM To: KunWang Cc: [email protected] Subject: RE: [question] get tashi run smoothly Using migration in Tashi is dependent on using the migration provided by the VMM underneath it. Are you using Qemu/KVM or Xen? If you are using Qemu/KVM, you need to be aware of some of the limitations inherent in that VMM's implementation of live migration (the disk image has to be served from the same file server, etc.). The Makefile exists to reorganize the source tree to be usable -- as you stated, python is not a compiled language. It also uses thrift to dynamically create some python code. I suspect you would see many errors if you didn't have thrift installed. Thrift is another Apache Incubator project (http://incubator.apache.org/thrift/). I'm glad to see you're trying to use Tashi and I'm glad to help you however I can. If you need more specific directions, we're working on some, but in the mean time, please send any error messages you are getting so that I can respond to those individually. The only request I have is that you send questions like this to [email protected], which is CC'd on this message. Thanks. - Michael ________________________________ From: KunWang [mailto:[email protected]] Sent: Friday, January 02, 2009 11:29 AM To: Ryan, Michael P Subject: [question] get tashi run smoothly Dear Michael, I watched your talk on http://blogs.intel.com/research/2008/10/cloud_computing_in_pittsburgh.php. >From your talk, I find you are already using tashi for migration. However, I > encountered some problem when I was trying to use tashi to establish cloud computing environment in my lab. I checked out my source code from http://incubator.apache.org/tashi/source_code.html I followed this tutorial to use tashi http://opencirrus.intel-research.net/index.php/Using_Tashi I found there are several Makefiles in the source tree. Except for the utilities, many error happened when I was trying to use GNU make to "compile" the source code. Since Python is an interpretive language, I found the Makefile didn't do too much concrete job. I can't find enough documents on that website on installing tashi. I am very interested in tashi. Could you please give me some advice to get tashi run smoothly like you? Thanks in advance. Regards, Kun
