code: def test_string(self):
      gpu = ProfileGPU(compute_capability="8.1")
      assert gpu.compute_capability == (8, 1)
  
imports: import argparse
  from typing import List, Tuple
  import pytest
  from dstack._internal.cli.services.configurators.profile import apply_profile_args, gpu_spec, register_profile_args
  from dstack._internal.core.models.profiles import Profile, ProfileGPU, ProfileResources, ProfileRetryPolicy, SpotPolicy
label_desc: Use image node_id 3 for calling the TestGPUComputeCapability obj's underlying member method code with example usage: obj.test_string() without return types