Changeset 527 for pkpgcounter/trunk/pkpgpdls/pil.py

Timestamp:

11/28/07 18:28:30 (17 years ago)

Author:

jerome

Message:

Now the presence of executable dependencies is tested at runtime.

Files:

• pkpgcounter/trunk/pkpgpdls/pil.py (modified) (1 diff)

pkpgcounter/trunk/pkpgpdls/pil.py

@@ -23 +23 @@
 """This modules implements a page counter for image formats supported by the Python Imaging Library."""
 
-from PIL import Image
+import pdlparser
 
-import pdlparser
+try :
+    from PIL import Image
+except ImportError :    
+    sys.stderr.write("ERROR: You MUST install the Python Imaging Library (python-imaging) for pkpgcounter to work.\n")
+    raise pdlparser.PDLParserError, "The Python Imaging Library is missing."
+
 import version
 
 class Parser(pdlparser.PDLParser) :
     """A parser for plain text documents."""
-    totiffcommands = [ 'convert "%(infname)s" "%(outfname)s"',
-                     ]  
+    totiffcommands = [ 'convert "%(infname)s" "%(outfname)s"' ]  
+    required = [ "convert" ]
     def isValid(self) :    
         """Returns True if data is an image format supported by PIL, else False."""