106 

   107 

   108 def getDuration(v1, v2=None):

   109     """Get delta between two dates"""

   110     if v2 is None:

   111         v2 = datetime.utcnow()

   112     assert isinstance(v1, datetime) and isinstance(v2, datetime)

   113     v1, v2 = min(v1, v2), max(v1, v2)

   114     delta = v2 - v1

   115     if delta.days > 60:

   116         return translate(_("%d months")) % int(round(delta.days * 1.0 / 30))

   117     elif delta.days > 10:

   118         return translate(_("%d weeks")) % int(round(delta.days * 1.0 / 7))

   119     elif delta.days >= 2:

   120         return translate(_("%d days")) % delta.days

   121     else:

   122         hours = int(round(delta.seconds * 1.0 / 3600))

   123         if delta.days == 1:

   124             return translate(_("%d day and %d hours")) % (delta.days, hours)

   125         else:

   126             if hours > 2:

   127                 return translate(_("%d hours")) % hours

   128             else:

   129                 minutes = int(round(delta.seconds * 1.0 / 60))

   130                 if minutes > 2:

   131                     return translate(_("%d minutes")) % minutes

   132                 else:

   133                     return translate(_("%d seconds")) % delta.seconds