Catch the exception and throw it again

Same behavior in Python and C#...
Wrong code:

 
try:
   # some code
except Exception, e:
   # log the exception or whatever
   raise e
 

Right code:

 
try:
   # some code
except Exception, e:
   # log the exception or whatever
   raise # JUST RAISE!!!
 

Wrong code:

 
try
{
   // whatever
}
catch (Exception e)
{
     // log the exception or whatever
     throw e
}
 

Right:

 
try
{
   // whatever
}
catch (Exception e)
{
     // log the exception or whatever
     throw // JUST THROW!!!
}
 

Reason: Exception stacktrace is lost if you write "raise e" or "throw e" instead of just "raise" or "throw".