X-Git-Url: http://git.tomasm.cz/imago.git/blobdiff_plain/8d05ccd11445ae069ae14dfb95d566907546e989..15a3ebaaddc23a2f69048d1def5a7f960d141d6b:/imago.py?ds=sidebyside

diff --git a/imago.py b/imago.py
index 6ab51a1..d234fec 100755
--- a/imago.py
+++ b/imago.py
@@ -1,9 +1,19 @@
 #!/usr/bin/env python
-"""Usage: imago.py file"""
+
+"""Usage:  imago.py file
+            analyses the given file
+        imago.py file --debug
+            shows every step of the computation
+        imago.py --help
+            shows this help"""
 
 import sys
 import math
-import Image, ImageDraw
+try:
+    import Image, ImageDraw
+except ImportError, msg:
+    print >>sys.stderr, msg
+    sys.exit(1)
 import im_debug
 import filter
 from hough import Hough