r10883 - /1.3/info.py -- February 24, 2010 - 01:00

Author: bugman
Date: Wed Feb 24 01:00:01 2010
New Revision: 10883

URL: http://svn.gna.org/viewcvs/relax?rev=10883&view=rev
Log:
Added a __getattr__() method for generating variables on the fly.

This is being used to create the 'page_first' and 'page_last' objects.


Modified:
    1.3/info.py

Modified: 1.3/info.py
URL: 
http://svn.gna.org/viewcvs/relax/1.3/info.py?rev=10883&r1=10882&r2=10883&view=diff
==============================================================================
--- 1.3/info.py (original)
+++ 1.3/info.py Wed Feb 24 01:00:01 2010
@@ -23,6 +23,9 @@
 # Module docstring.
 """Module containing the introductory text container."""
 
+# Python module imports.
+from string import split
+
 # relax module imports.
 import dep_check
 import numpy
@@ -392,6 +395,42 @@
     url = None
     pages = None
     year = None
+
+
+    def __getattr__(self, name):
+        """Generate some variables on the fly.
+
+        This is only called for objects not found in the class.
+
+        @param name:    The name of the object.
+        @type name:     str
+        @raises:        AttributeError if the object cannot be created.
+        @returns:       The generated object.
+        @rtype:         anything
+        """
+
+        # Page numbers.
+        if name in ['page_first', 'page_last']:
+            # No page info.
+            if not self.pages:
+                return None
+
+            # First split the page range.
+            vals = split(self.pages, '-')
+
+            # Single page.
+            if len(vals) == 1:
+                return vals[0]
+
+            # First page.
+            if name == 'page_first':
+                return vals[0]
+
+            # Last page.
+            if name == 'page_last':
+                return vals[1]
+
+        raise AttributeError, name
 
 
     def cite_short(self, author=True, title=True, journal=True, volume=True, 
number=True, pages=True, year=True, doi=True, url=True):