how to make the below code look better

[me]

On 2015-12-02, Ganesh Pal <ganesh1pal at gmail.com> wrote:
> if not os.path.ismount("/tmp"):
>            sys.exit("/tmp not mounted.")
> else:
>      if  create_dataset() and check_permission():
>      try:
>           run_full_back_up()
>           run_partial_back_up()
>     except Exception, e:
>             logging.error(e)
>             sys.exit("Running backup failed")
>     if not validation_errors():
>         sys.exit("Validation failed")
>     else:
>         try:
>             compare_results()
>         except Exception, e:
>                logging.error(e)
>                sys.exit("Comparing result failed")

Apart from what already mentioned (indentation, assumptions on
environment):

> 1.  if  create_dataset() and check_permission():
>     Iam assuming that if statement will be executed only if both the
> functions are true ?

Yes, this is the meaning of 'and'.
Notice how functions are always true, but the result of the function call
might not be.

- create_dataset is a function.
- create_dataset() is a function call.

> 2. Can I have a if statement within  if else ? , some how I feel its messy

You are searching for `elif`.