Read categories and tags for all VM in vCenter using vSphere Automation SDK

vapi_vm_tags.py

from vmware.vapi.vsphere.client import create_vsphere_client

client = create_vsphere_client(
    server='my-company-vcenter.com',
    username='my_login',
    password='my_password',
    session=None)

cat_dict = {}
for id in client.tagging.Category.list():
    cat = client.tagging.Category.get(id)
    cat_dict[cat.id] = cat.name

tag_dict = {}
for id in client.tagging.Tag.list():
    tag = client.tagging.Tag.get(id)
    tag_dict[id] = tag

vms = client.vcenter.VM.list()
vm_objs = [{'id': v.vm, 'type': 'VirtualMachine'} for v in vms]

vm_tags = {}
for vm in client.tagging.TagAssociation.list_attached_tags_on_objects(vm_objs):
    cat_tag_dict = {}
    for ti in vm.tag_ids:
        cat_name = cat_dict[tag_dict[ti].category_id]
        if cat_name not in cat_tag_dict:
            cat_tag_dict[cat_name] = []
        cat_tag_dict[cat_name].append(tag_dict[ti].name)
    vm_tags[vm.object_id.id] = cat_tag_dict
print(vm_tags)