find addr_id exception: list index out of range

[oxalorg]

In the past 25 minutes (so 5 executions). I have received this exception once.

...
No delivery slot is found.

Visiting main website...
Visiting cart page...
Traceback (most recent call last):
  File "check_if_delivery_slot_available.py", line 48, in wrapper
    return job_func(*args, **kwargs)
  File "check_if_delivery_slot_available.py", line 70, in job
    addr_id = notifier.visit_cart_page_and_get_address_id()
  File "/home/ox/code/bigbasket-notifier/src/notifier.py", line 105, in visit_cart_page_and_get_address_id
    addr_id = self._find_address_id(resp.text)
  File "/home/ox/code/bigbasket-notifier/src/notifier.py", line 121, in _find_address_id
    return html.split("'addr_id'")[1][:30].split()[1]
IndexError: list index out of range

[SlapBot]

Yep, It seems to happen occasionally for me as well although it shouldn't crash the program because of exceptions check. Issue looks to be related with BigBasket's website.

Solution to more stability can be discussed with #2 since its closely related with it.