Error while updating GTM pool member ratio

Hi,

Pool Member update function is failing when updating ratio. Member has ratio inside it. When I give member.ratio it returns proper ratio value but while updating it behave unexpectedly. Am I missing something? Is there any other way we can modify pool member ratio? I have tried updating ratio using below concept:

Fetch members from pool

def fetch_datacenter_state(pools, pool_name, datacenter_name):

for pool in pools:
    if (pool.name == pool_name):
        print ("Testing Datacenter %s...") % (datacenter_name)
        for member in pool.members_s.get_collection():
            if (member.name == datacenter_name):
                print ("Ration before update: %s") % (member.ratio)
                help(member.update)
                member.update(ratio=10)
                print ("Ration after update: %s") % (member.ratio)

File "/usr/local/lib/python2.7/copy.py", line 257, in _deepcopy_dict y[deepcopy(key, memo)] = deepcopy(value, memo) File "/usr/local/lib/python2.7/copy.py", line 182, in deepcopy rv = reductor(2)

TypeError: can't pickle getset_descriptor objects Result: 1