Add Python 2.4 tests

[jamoore]

Several Python 2.5+ syntax features crept in 4.2.0. All python tests should also be run against 2.4 as long as we support it.

See: ​https://www.openmicroscopy.org/community/viewtopic.php?f=5&t=465&start=0

[jburel]

Moved from sprint 2010-09-30 (17)

[jmoore]

Created OMERO-trunk-python2.4-integration job on hudson. Uses the virtualenv $HOME/env2.4/ on the hudson master to run tests. Many tests may fail initially due to missing IcePy for 2.4 which we'll have to compile ourselves.

[jmoore]

(In [8338]) Fixing non-Python2.4 scripts syntax (See #2833)

[wmoore]

Josh: Is there a way to achieve the same functionality

except: raise

in Python 2.4 syntax?

The reason I put the 'raise' in was because I found that if you don't then any exception you get from running the script doesn't get reported back to you. The script fails 'silently' and you have no idea what went wrong. The stack trace is useful both for developing and when others are using the script and reporting bugs.

[jmoore]

Will,

I think something else must have been going on in the scripts.

try:
    1/0
except:
    raise
finally:
    pass

is identical to:

try:
    1/0
finally:
    pass

since if there is no except clause the exception will automatically be raised. If you can reproduce what you were seeing, it might point to some other issue which we need to address, but in general, you don't need "except: raise" or anything similar.

Here's a full example, if it might help you find out what was going on:

import unittest

class Test(unittest.TestCase):

    def withoutExcept(self):
        try:
            1/0
        finally:
            pass

    def withExcept(self):
        try:
            1/0
        except: raise # must be commented out for Python2.4
        finally:
            pass

    def testExceptions(self):
        self.assertRaises(ZeroDivisionError, self.withoutExcept)
        self.assertRaises(ZeroDivisionError, self.withExcept)

if __name__ == "__main__":
    unittest.main()

[jmoore]

(In [8353]) Fixing more non-Python2.4 scripts syntax (See #2833)

[jmoore]

(In [8377]) Fixing integration/library.py (See #2833)

[jmoore]

Though the job is not passing, the only thing failing is the use of PyTables due to a bad installation, as far as I can tell. Closing this ticket, and as a general part of #1736 (hudson green) we'll improve that.

[jmoore]

(In [8392]) Fix for library.py's index method (See #2833)