code: def test_PETPVC_inputs():
      input_map = dict(
          alpha=dict(
              argstr="-a %.4f",
              usedefault=True,
          ),
          args=dict(
              argstr="%s",
          ),
          debug=dict(
              argstr="-d",
              usedefault=True,
          ),
          environ=dict(
              nohash=True,
              usedefault=True,
          ),
          fwhm_x=dict(
              argstr="-x %.4f",
              mandatory=True,
          ),
          fwhm_y=dict(
              argstr="-y %.4f",
              mandatory=True,
          ),
          fwhm_z=dict(
              argstr="-z %.4f",
              mandatory=True,
          ),
          in_file=dict(
              argstr="-i %s",
              extensions=None,
              mandatory=True,
          ),
          mask_file=dict(
              argstr="-m %s",
              extensions=None,
              mandatory=True,
          ),
          n_deconv=dict(
              argstr="-k %d",
              usedefault=True,
          ),
          n_iter=dict(
              argstr="-n %d",
              usedefault=True,
          ),
          out_file=dict(
              argstr="-o %s",
              extensions=None,
              genfile=True,
              hash_files=False,
          ),
          pvc=dict(
              argstr="-p %s",
              mandatory=True,
          ),
          stop_crit=dict(
              argstr="-s %.4f",
              usedefault=True,
          ),
      )
      inputs = PETPVC.input_spec()
  
      for key, metadata in list(input_map.items()):
          for metakey, value in list(metadata.items()):
              assert getattr(inputs.traits()[key], metakey) == value
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_PETPVC_inputs() without return types