make up for lack of 'total_seconds()' lib function for pre 2.7 version of python

python_apps/pypo/pure.py

@@ -5,3 +5,13 @@ def version_cmp(version1, version2):
     def normalize(v):
         return [int(x) for x in re.sub(r'(\.0+)*$','', v).split(".")]
     return cmp(normalize(version1), normalize(version2))
+
+def date_interval_to_seconds(interval):
+    """
+    Convert timedelta object into int representing the number of seconds. If
+    number of seconds is less than 0, then return 0.
+    """
+    seconds = (interval.microseconds + \
+               (interval.seconds + interval.days * 24 * 3600) * 10 ** 6) / float(10 ** 6)
+
+    return seconds