code: def test_label_reproducible():
      labels = []
      for _ in range(2):
          with label_scope("default"):
              label1 = auto_label("default")
              label2 = auto_label()
              labels.append(label2)
          assert label1 == "default/default"
          assert label2 == "default/1"
  
file_path: nni/test/ut/sdk/mutable/test_label.py
imports: import pytest
  from nni.mutable import label_scope, auto_label
  from nni.mutable.utils import reset_uid
label_desc: Use image node_id 3 for calling a global function with example usage: test_label_reproducible() without return types