Need help on F5 automation to read the irules attached t all the virtual servers

This is tested with Python 3.4.3 and BigIP 12.1. Did not have 12.0 installation readily available, but it should work the same for you

from f5.bigip import ManagementRoot

 Optional: omit unsecure certificate warnings from output
import requests
from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)

API_ROOT = ManagementRoot("bip-01", "admin", "admin")
VSERVER_COLLECTION = API_ROOT.tm.ltm.virtuals.get_collection()

for vserver in VSERVER_COLLECTION:
    print(vserver.name)
     Catch an error to avoid a VS with no iRules breaking the script prematurely
    try:
        irules = vserver.rules
    except AttributeError:
        print('- No iRules on this Virtual Server!')
    else:
        for rule in vserver.rules:
            print('-', rule)

Output in test env:

$ python list_irules.py

vs_0.0.0.0_any
- No iRules on this Virtual Server!
vs_test_80
- /Common/ir_do_nothing
- /Common/ir_do_nothing_again
vs_test_443
- /Common/ir_do_nothing
- /Common/ir_do_nothing_again

As you can see from the script above, this takes a bit of testing to get the iRules listed. Ofcourse, ideally either the API or SDK should return an empty list if there are no iRules on a Virtual Server, rather than a script-breaking "AttributeError: 'f5.bigip.tm.ltm.virtual.Virtual'>' object has no attribute 'rules'". SDK is a build up on top of a problematic API, so eventually this problem should be addressed by the API developers.