How to use the pyhf.Workspace function in pyhf

tempout = tmpdir.join("rename_output.json")
    command = 'pyhf rename -m staterror_channel1 staterror_channelone --measurement GammaExample GamEx {0:s} --output-file {1:s}'.format(
        temp.strpath, tempout.strpath
    )
    ret = script_runner.run(*shlex.split(command))
    assert ret.success

    spec = json.loads(temp.read())
    ws = pyhf.Workspace(spec)
    assert 'GammaExample' in ws.measurement_names
    assert 'GamEx' not in ws.measurement_names
    assert 'staterror_channel1' in ws.parameters
    assert 'staterror_channelone' not in ws.parameters
    renamed_spec = json.loads(tempout.read())
    renamed_ws = pyhf.Workspace(renamed_spec)
    assert 'GammaExample' not in renamed_ws.measurement_names
    assert 'GamEx' in renamed_ws.measurement_names
    assert 'staterror_channel1' not in renamed_ws.parameters
    assert 'staterror_channelone' in renamed_ws.parameters

)
    ret = script_runner.run(*shlex.split(command))

    tempout = tmpdir.join("prune_output.json")
    command = 'pyhf prune -m staterror_channel1 --measurement GammaExample {0:s} --output-file {1:s}'.format(
        temp.strpath, tempout.strpath
    )
    ret = script_runner.run(*shlex.split(command))
    assert ret.success

    spec = json.loads(temp.read())
    ws = pyhf.Workspace(spec)
    assert 'GammaExample' in ws.measurement_names
    assert 'staterror_channel1' in ws.parameters
    pruned_spec = json.loads(tempout.read())
    pruned_ws = pyhf.Workspace(pruned_spec)
    assert 'GammaExample' not in pruned_ws.measurement_names
    assert 'staterror_channel1' not in pruned_ws.parameters

def test_rename_outfile(tmpdir, script_runner):
    temp = tmpdir.join("parsed_output.json")
    command = 'pyhf xml2json validation/xmlimport_input/config/example.xml --basedir validation/xmlimport_input/ --output-file {0:s} --hide-progress'.format(
        temp.strpath
    )
    ret = script_runner.run(*shlex.split(command))

    tempout = tmpdir.join("rename_output.json")
    command = 'pyhf rename -m staterror_channel1 staterror_channelone --measurement GammaExample GamEx {0:s} --output-file {1:s}'.format(
        temp.strpath, tempout.strpath
    )
    ret = script_runner.run(*shlex.split(command))
    assert ret.success

    spec = json.loads(temp.read())
    ws = pyhf.Workspace(spec)
    assert 'GammaExample' in ws.measurement_names
    assert 'GamEx' not in ws.measurement_names
    assert 'staterror_channel1' in ws.parameters
    assert 'staterror_channelone' not in ws.parameters
    renamed_spec = json.loads(tempout.read())
    renamed_ws = pyhf.Workspace(renamed_spec)
    assert 'GammaExample' not in renamed_ws.measurement_names
    assert 'GamEx' in renamed_ws.measurement_names
    assert 'staterror_channel1' not in renamed_ws.parameters
    assert 'staterror_channelone' in renamed_ws.parameters

def test_prune_outfile(tmpdir, script_runner):
    temp = tmpdir.join("parsed_output.json")
    command = 'pyhf xml2json validation/xmlimport_input/config/example.xml --basedir validation/xmlimport_input/ --output-file {0:s} --hide-progress'.format(
        temp.strpath
    )
    ret = script_runner.run(*shlex.split(command))

    tempout = tmpdir.join("prune_output.json")
    command = 'pyhf prune -m staterror_channel1 --measurement GammaExample {0:s} --output-file {1:s}'.format(
        temp.strpath, tempout.strpath
    )
    ret = script_runner.run(*shlex.split(command))
    assert ret.success

    spec = json.loads(temp.read())
    ws = pyhf.Workspace(spec)
    assert 'GammaExample' in ws.measurement_names
    assert 'staterror_channel1' in ws.parameters
    pruned_spec = json.loads(tempout.read())
    pruned_ws = pyhf.Workspace(pruned_spec)
    assert 'GammaExample' not in pruned_ws.measurement_names
    assert 'staterror_channel1' not in pruned_ws.parameters

def test_import_normfactor_bounds():
    parsed_xml = pyhf.readxml.parse(
        'validation/xmlimport_input2/config/example.xml', 'validation/xmlimport_input2'
    )

    ws = pyhf.Workspace(parsed_xml)
    assert ('SigXsecOverSM', 'normfactor') in ws.modifiers
    parameters = [
        p
        for p in ws.get_measurement(measurement_name='GaussExample')['config'][
            'parameters'
        ]
        if p['name'] == 'SigXsecOverSM'
    ]
    assert len(parameters) == 1
    parameter = parameters[0]
    assert parameter['bounds'] == [[0, 10]]

    return lambda: pyhf.Workspace(workspace_xml)

},
        modifiers={
            'syst1': 'syst4',
            'bkg1Shape': 'bkg3Shape',
            'bkg2Shape': 'bkg4Shape',
        },
        measurements={
            'ConstExample': 'OtherConstExample',
            'LogNormExample': 'OtherLogNormExample',
            'GaussExample': 'OtherGaussExample',
            'GammaExample': 'OtherGammaExample',
        },
    )
    new_ws.version = '0.0.0'
    with pytest.raises(pyhf.exceptions.InvalidWorkspaceOperation) as excinfo:
        combined = pyhf.Workspace.combine(ws, new_ws)