How to use the rwslib.extras.rwscmd.odmutils.E_ODM function in rwslib

def autofill(ctx, steps, metadata, fixed, study, environment, subject):
    """Request enterable data for a subject, generate data values and post back to Rave.
    Requires 'rwscmd_getdata' configurable dataset to be installed on the Rave URL."""

    if metadata is not None:  # Read metadata from file, if supplied
        odm_metadata = metadata.read()
        meta_v = etree.fromstring(odm_metadata).find('.//' + E_ODM.METADATA_VERSION.value).get(A_ODM.OID.value)
    else:
        odm_metadata = None
        meta_v = None

    fixed_values = {}
    if fixed is not None:  # Read fixed values from file, if supplied
        for f in fixed:
            oid, value = f.decode().split(',')
            fixed_values[oid] = value
            if ctx.obj['VERBOSE']:
                click.echo('Fixing {} to value: {}'.format(oid, value))

    try:
        for n in range(0, steps):
            if ctx.obj['VERBOSE']:
                click.echo('Step {}'.format(str(n + 1)))

def scramble_codelist(self, codelist):
        """Return random element from code list"""
        # TODO:  External code lists
        path = ".//{0}[@{1}='{2}']".format(E_ODM.CODELIST.value, A_ODM.OID.value, codelist)
        elem = self.metadata.find(path)
        codes = []
        for c in elem.iter(E_ODM.CODELIST_ITEM.value):
            codes.append(c.get(A_ODM.CODED_VALUE.value))
        for c in elem.iter(E_ODM.ENUMERATED_ITEM.value):
            codes.append(c.get(A_ODM.CODED_VALUE.value))

        return fake.random_element(codes)

def scramble_itemdata(self, oid, value):
        """If metadata provided, use it to scramble the value based on data type"""
        if self.metadata is not None:
            path = ".//{0}[@{1}='{2}']".format(E_ODM.ITEM_DEF.value, A_ODM.OID.value, oid)
            elem = self.metadata.find(path)
            # for elem in self.metadata.iter(E_ODM.ITEM_DEF.value):
            datatype = elem.get(A_ODM.DATATYPE.value)

            codelist = None
            for el in elem.iter(E_ODM.CODELIST_REF.value):
                codelist = el.get(A_ODM.CODELIST_OID.value)

            length = 1 if not A_ODM.LENGTH in elem else int(elem.get(A_ODM.LENGTH.value))

            if A_ODM.SIGNIFICANT_DIGITS.value in elem.keys():
                sd = elem.get(A_ODM.SIGNIFICANT_DIGITS.value)
            else:
                sd = 0

            if A_ODM.DATETIME_FORMAT.value in elem.keys():

def scramble_itemdata(self, oid, value):
        """If metadata provided, use it to scramble the value based on data type"""
        if self.metadata is not None:
            path = ".//{0}[@{1}='{2}']".format(E_ODM.ITEM_DEF.value, A_ODM.OID.value, oid)
            elem = self.metadata.find(path)
            # for elem in self.metadata.iter(E_ODM.ITEM_DEF.value):
            datatype = elem.get(A_ODM.DATATYPE.value)

            codelist = None
            for el in elem.iter(E_ODM.CODELIST_REF.value):
                codelist = el.get(A_ODM.CODELIST_OID.value)

            length = 1 if not A_ODM.LENGTH in elem else int(elem.get(A_ODM.LENGTH.value))

            if A_ODM.SIGNIFICANT_DIGITS.value in elem.keys():
                sd = elem.get(A_ODM.SIGNIFICANT_DIGITS.value)
            else:
                sd = 0

            if A_ODM.DATETIME_FORMAT.value in elem.keys():
                dt_format = elem.get(A_ODM.DATETIME_FORMAT.value)
                for fmt in [('yyyy', '%Y'), ('MMM', '%b'), ('dd', '%d'), ('HH', '%H'), ('nn', '%M'), ('ss', '%S'),
                            ('-', '')]:
                    dt_format = dt_format.replace(fmt[0], fmt[1])

            if codelist is not None:

def fill_empty(self, fixed_values, input):
        """Fill in random values for all empty-valued ItemData elements in an ODM document"""
        odm_elements = etree.fromstring(input)

        for v in odm_elements.iter(E_ODM.ITEM_DATA.value):
            if v.get(A_ODM.VALUE.value) == "":
                oid = v.get(A_ODM.ITEM_OID.value)

                if fixed_values is not None and oid in fixed_values:
                    d = fixed_values[oid]
                else:
                    d = self.scramble_itemdata(v.get(A_ODM.ITEM_OID.value), v.get(A_ODM.VALUE.value))

                v.set(A_ODM.VALUE.value, d)
            else:
                # Remove ItemData if it already has a value
                v.getparent().remove(v)

        # Remove empty ItemGroupData elements
        for v in odm_elements.iter(E_ODM.ITEM_GROUP_DATA.value):
            if len(v) == 0:

if meta_v != subject_meta_v:
                if ctx.obj['VERBOSE']:
                    click.echo('Getting metadata version {}'.format(subject_meta_v))
                ctx.obj['RWS'].send_request(StudyVersionRequest(study, subject_meta_v))
                odm_metadata = ctx.obj['RWS'].last_result.text
                meta_v = subject_meta_v

            # Generate data values to fill in empty fields
            if ctx.obj['VERBOSE']:
                click.echo('Generating data')

            scr = Scramble(odm_metadata)
            odm = scr.fill_empty(fixed_values, subject_data)

            # If new data values, post to RWS
            if etree.fromstring(odm).find('.//' + E_ODM.ITEM_DATA.value) is None:
                if ctx.obj['VERBOSE']:
                    click.echo('No data to send')
                break
            ctx.obj['RWS'].send_request(PostDataRequest(odm))
            if ctx.obj['RAW']:
                click.echo(ctx.obj['RWS'].last_result.text)

    except RWSException as e:
        click.echo(e.rws_error)

    except requests.exceptions.HTTPError as e:
        click.echo(e.strerror)