FW: python import sys.path

[Kelly, Brian]

After following your suggestions I was able to confirm that the 2.5
interpreter was being invoked. So then I grepped for all instances of python
in the scripts that were imported as modules: from bacula_conf import *


The calling script cleanup.py is invoking purge_client.py like an external
script:

def purgeAll(options, computer_name):
cmd = "python purge_client.py %s" % computer_name
if options.pretend <> True:
error = os.system(cmd)
else:
_log.info("Done. No changes made due to --pretend flag.")
if not error:
return True
else:
return False


When I saw the imports I assumed the functions in purge_client.py were being
referenced from the calling scripts symbol table. However, that is not the
case.

Thanks,
Brian
-----Original Message-----
From: John Machin [mailto:[email protected]]
Sent: Tuesday, December 30, 2008 4:42 PM
To: (e-mail address removed)
Subject: Re: python import sys.path

I have both 2.4 and 2.5 interpreters installed on a linux box. The
PythonPath is set to :

PYTHONPATH=/usr/lib64/portage/pym:/prod/bacula/local/lib64/python2.4/site-pa
ckages:/prod/bacula/local/lib/python2.4/site-packages

My main script is getting called like so:

python2.4 cleanup.py wrkstnbs

The imports statements in cleanup.py are as follows:

import os,sys
print sys.path
from datetime import datetime
from optparse import OptionParser        # used for parsing parameters
from bacula_conf import *                # used for connecting to our
databases, etc.
from registration_cleanup \
    import RegistrationCleanup           # used for interacting w/
registration db (sql1)
                                         # and configuration database
(genunix)
import directory_cleanup as fclean       # file cleanup.

One of the scripts being imported from bacula_conf is called
purge_client.py.

It has the following imports:

import sys
import MySQLdb

Everytime I run "python2.4 cleanup.py wrkstnbs" I get the following error:

Traceback (most recent call last):

Have you snipped any traceback entries here? You say you are running
cleanup.py but the first traceback entry is from purge_client.py!!

You should first fix that, so that you've got the full story. My guess
is that something along that trail is invoking another instance of the
Python interpreter and somehow that instance is 2.5, not 2.4. I can't
imagine how those 2.5-related entries would otherwise get into
sys.path

Suggestions: (1) where you are debug-printing sys.path, also print
sys.version and sys.argv[0] ... and do debug-printing at more places
between start and error.
(2) run "python2.4 -vv cleanup.py wrkstnbs" and look for the first
mention of 2.5 (indicating something has manipulated sys.path), or
sudden cessation of -vv output (indicating a new instance of python is
running without -vv), or some other phenomenon ...

  File "purge_client.py", line 22, in <module>
    import MySQLdb
  File
"/prod/bacula/local/lib64/python2.4/site-packages/MySQLdb/__init__.py", line
27, in <module>
    import _mysql
ImportError: /prod/bacula/local/lib64/python2.4/site-packages/_mysql.so:
undefined symbol: Py_InitModule4

What happens when you run python2.4 and at the interactive prompt do? Is there a possibility that you installed 2.5 MySQLdb into the 2.4
hierarchy? [could be a stupid question from a windows guy; this may be
a non-problem on linux]

Is this the first thing that you've tried after installing 2.5, or the
only problem found in an exhaustive regression test of all your apps
using 2.4, or somewhere in the middle?

[big snip]

HTH,
John

 

[John Machin]

After following your suggestions I was able to confirm that the 2.5
interpreter was being invoked. So then I grepped for all instances of python
in the scripts that were imported as modules: from bacula_conf import *

The calling script cleanup.py is invoking purge_client.py like an external
script:

def purgeAll(options, computer_name):
    cmd = "python purge_client.py %s" % computer_name
    if options.pretend <> True:

Who wrote that?

        error = os.system(cmd)
    else:
        _log.info("Done. No changes made due to --pretend flag.")

#### error is not defined in this branch

    if not error: #### Splat!
        return True
    else:
        return False

AArrgh! Try:

return not error

When I saw the imports I assumed the functions in purge_client.py were being
referenced from the calling scripts symbol table.

What does that mean??

 

[Fuzzyman]

Who wrote that?


           #### error is not defined in this branch>     if not error: #### Splat!

 AArrgh! Try:

   return not error

That will still blow up with a NameError when the path doing the
logging is invoked.

How about:


def purgeAll(options, computer_name):
cmd = "python purge_client.py %s" % computer_name
if options.pretend != True: # if not options.pretend (assuming it
is a bool)
error = os.system(cmd)
return not error

_log.info("Done. No changes made due to --pretend flag.")
return True


Michael