code: def test_constant():
      rates = constant(123)
      assert next(rates) == 123
      assert next(rates) == 123
  
imports: from thinc.api import compounding, constant, constant_then, cyclic_triangular, decaying, slanted_triangular, warmup_linear
label_desc: Use image node_id 5 for calling a global function with example usage: test_constant() without return types