# Generate counts of some of the main objects num_instances= BookInstance.objects.all().count()
num_instances_availablenum_authors = Author.objects.count()
cont
# Generate counts of some of the main objects num_instances= BookInstance.objects.all().count()
num_instances_availablenum_authors = Author.objects.count()
cont
gcloud compute instances create --zone us-west1-a tunnel
- The zone 'projects/project/zones/us-west1-a' does not have enough
resources available在Google Cloud控制台平台中,专区显示为availabl