Re: [cx-freeze-users] Problem with PIL Image.py

[Bob I. <bo...@re...>]

On Mar 13, 2005, at 9:49, Sharrea Day wrote:

> Bob Ippolito wrote:
>
>> On Mar 7, 2005, at 1:19 AM, Sharrea Day wrote:
>>
>>> I'm new to FreezePython so please bear with me.  I've searched for 
>>> an answer to this and found a couple of workarounds that didn't work 
>>> for me.
>>>
>>> Using python-2.3.3 and FreezePython-3.0.1 I froze my app which works 
>>> fine before freezing - but after freezing I get an error "cannot 
>>> identify image file" from PIL's Image module called by ReportLab.
>>>
>>> I've tried importing the image plugin (import GifImagePlugin) in my 
>>> main python script file before freezing but still get the error.
>>
>>
>> This is the code that py2app injects into your application's 
>> bootstrap when you use PIL, which monkeypatches the initialization so 
>> it works correctly from a packaged environment...
>>
>> def _recipes_pil_prescript(plugins):
>>     import Image
>>     import sys
>>     def init():
>>         if Image._initialized >= 2:
>>             return
>>         for plugin in plugins:
>>             try:
>>                 __import__(plugin, globals(), locals(), [])
>>             except ImportError:
>>                 if Image.DEBUG:
>>                     print 'Image: failed to import'
>>                     print f, ':', sys.exc_info()[1]
>>         if Image.OPEN or Image.SAVE:
>>             Image._initialized = 2
>>     Image.init = init
>>
>> It also automatically detects every ImagePlugin you have, and adds 
>> them all to the application automatically, so you don't need to do 
>> any explicit imports.  With cx_Freeze, you would have to do that 
>> manually.
>
> Thanks for your input bob.  Unfortunately I'm new to python... well 
> any programming actually... this is my first program.
>
> I tried fiddling with the PIL files to no avail and I couldn't figure 
> out how to manually do anything with my application's "bootstrap" (a 
> google search wasn't much help either).  I decided to remove the image 
> from the invoices that ReportLab produces for now.  I'll have another 
> go at it sometime in the future.
>
> Who knows, if any code sharing occurs between cx_freeze and py2app 
> then my problem might disappear anyway (fingers crossed).
>
> Even if I couldn't solve my problem your help was much appreciated.

Yeah, this certainly isn't first python program stuff (unless you were 
using a Mac with py2app, in which case it would've worked fine).  
Bootstrap is just py2app terminology, I'm not sure if cx_Freeze has 
something similar or not.  py2app runs a script full of initialization 
code (currently named __boot__.py) to set up the environment before it 
runs your main script.  If cx_Freeze has nothing similar, then you 
would simply place the code at the top of the main script.  The code 
above will not work unchanged from cx_Freeze, though.  It would need to 
also have something like this:

# these are hints for cx_Freeze so that the modules get included, 
modules not listed will not work.
import GifImagePlugin, JpegImagePlugin, PngImagePlugin
# and this initializes PIL with the default set of plugins that are 
desired
_recipes_pil_prescript("GifImagePlugin JpegImagePlugin 
PngImagePlugin".split())

-bob