code: def test_single_op():
      "Program: fn (%x : float32) { let %t1 = f(%x); %t1 }"
      x = relay.var("x", shape=[])
      func = relay.Function([x], op.log(x))
      ttype = relay.TensorType([], dtype="float32")
      assert_has_type(func, relay.FuncType([ttype], ttype))
  
imports: import pytest
  import tvm
  from tvm import IRModule, parser, relay, te
  from tvm.relay import analysis, op, transform
  from tvm.relay.op import op
  import numpy
label_desc: Use image node_id 6 for calling a global function with example usage: test_single_op() without return types