code: def test_dev_version():
      assert Version("1.9.0.dev+Unknown") < Version("1.9.0")
      for ver in [
          "1.9.0",
          "1.9.0a1",
          "1.9.0b2",
          "1.9.0b2.dev+ffffffff",
          "1.9.0.dev1",
      ]:
          assert Version("1.9.0.dev+f16acvda") < Version(ver)
  
      assert Version("1.9.0.dev+f16acvda") == Version(
          "1.9.0.dev+f16acvda"
      )
  
file_path: scipy/scipy/_lib/tests/test__pep440.py
imports: from pytest import raises
  from scipy._lib._pep440 import Version, parse
label_desc: Use image node_id 4 for calling a global function with example usage: test_dev_version() without return types