Trying to assign a policy to a virtual server

also...this code should *just work* once we get your partitions worked out

# Load existing virtual with no policy and assert it doesn't exist on the virtual
v1 = b.tm.ltm.virtuals.virtual.load(‘name’: ‘myvip’, ‘partition’: ‘Common’)
assert v1.policies_s.policies.exists(‘name’: ‘mypol’, ‘partition’: ‘Common’) is False
# Add the existing policy to the virtual
v1_pol = v1.policies_s.policies.create(name=‘mypol’, ‘partition’: ‘Common’)
# Refresh the virtual object so the newly attached policy is referenced locally
v1.refresh()
# assert the policy exists on the virtual
assert v1.policies_s.policies.exists(‘name’: ‘mypol’, ‘partition’: ‘Common’) is True

so i added debugging in to the code, and then tried to run the code you added below.  here's the output:

loading v1
asserting policy is not there
loading policy
exception caught: 404 Unexpected Error: Not Found for uri: https://10.80.91.172:443/mgmt/tm/ltm/virtual/~QA1_Web~reporting~serviceMain/policies/
Text: '{"code":404,"message":"01020036:3: The requested policy (Portal_QA1) was not found.","errorStack":[],"apiError":3}'
debug output
curl -k -X GET https://10.80.91.172:443/mgmt/tm/ltm/virtual/~QA1_Web~reporting~serviceMain -H 'User-Agent: python-requests/2.26.0 f5-icontrol-rest-python/1.3.13' -H 'Accept-Encoding: gzip, deflate' -H 'Accept: */*' -H 'Connection: keep-alive' -H 'Content-Type: application/json' -H 'Cookie: AUTH_TOKEN; BIGIPAuthUsernameCookie=svc-f5scraperlabRO' -H 'Authorization: Basic AUTH'
curl -k -X GET https://10.80.91.172:443/mgmt/tm/ltm/virtual/~QA1_Web~reporting~serviceMain/policies/ -H 'User-Agent: python-requests/2.26.0 f5-icontrol-rest-python/1.3.13' -H 'Accept-Encoding: gzip, deflate' -H 'Accept: */*' -H 'Connection: keep-alive' -H 'Content-Type: application/json' -H 'Cookie: AUTH_TOKEN; BIGIPAuthUsernameCookie=svc-f5scraperlabRO' -H 'Authorization: Basic AUTH'
curl -k -X POST https://10.80.91.172:443/mgmt/tm/ltm/virtual/~QA1_Web~reporting~serviceMain/policies/ -H 'User-Agent: python-requests/2.26.0 f5-icontrol-rest-python/1.3.13' -H 'Accept-Encoding: gzip, deflate' -H 'Accept: */*' -H 'Connection: keep-alive' -H 'Content-Type: application/json' -H 'Cookie: AUTH_TOKEN; BIGIPAuthUsernameCookie=svc-f5scraperlabRO' -H 'Content-Length: 67' -H 'Authorization: Basic AUTH' -d '{"name": "Portal_QA1", "partition": "QA1_Web", "subPath": "Shared"}'

it seems that the partition and subpath are being added to the request. 

one thought i had was that there might be something that i have to do differently, as the policy and vs are in different subpaths.  could that be what's causing the issue?

if i remove the partition/subpath when loading the vs, it gives me a 404 error, so that's not going to work, since none of these are in /Common partition.