"import PIL" may fail in some cases

[jamoore]

Depending on how PIL was installed, it may should be imported as import Image or from PIL import Image.

However, in some cases, BOTH may work and cause failures: See #9790.
Therefore it is essential that they are done IN THE SAME ORDER every time.

In all OMERO uses, both should be attempt in a try/except block in this order:

try:
    from PIL import Image, ImageDraw, ImageFont     # see ticket:2597
except: #pragma: nocover
    try:
        import Image, ImageDraw, ImageFont          # see ticket:2597
    except:
        logger.error('No PIL installed')

Searching for any import of PIL should also show this ticket number:

$ git grep "import Image"

Therefore, this should show NOTHING:

:OmeroPy will$ git grep "import Image" | grep -v ticket:2597 | grep -vE "(ImageI|ImageAnnotationLinkI|ImageWrapper|ImageColumn|ImageData)"

See: ​http://code.djangoproject.com/ticket/6054

[jmoore]

(In [7562]) Marking all uses of PIL with "see #2597"

[jmoore]

(In [7564]) Marking all uses of PIL with "see #2597"

original-svn-id: ​file:///home/svn/omero/branches/Beta4.2@7562 05709c45-44f0-0310-885b-81a1db45b4a6