How to use the stix2.Indicator function in stix2

'[ url:value = \'http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab?b16bed41061b4861\' ]',
        '[ url:value = \'http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab?9a8ede518893069d\' ]',
        '[ url:value = \'http://go.microsoft.com/fwlink/?LinkId=544713\' ]',
        '[ url:value = \'http://ns.adobe.com/xap/1.0/mm/\' ]',
        '[ url:value = \'http://ns.adobe.com/xap/1.0/sType/ResourceRef\' ]',
        '[ url:value = \'http://ns.adobe.com/xap/1.0/\' ]',
        '[ file:hashes.\'SHA-1\' = \'91fd2d2935aedcb47271b54cd22f8fe3b30c17fd\' OR file:hashes.\'SHA-256\' = \'90b1e39282dbda2341d91b87ca161afe564b7d3b4f82f25b3f1dce3fa857226c\' OR file:hashes.\'MD5\' = \'34303fdb55e5d0f1142bb07eed2064cb\' ]'
    ]
    extracted_indicator_expressions = []

    with open(os.path.join(CWD, 'sample_report.json')) as sample_report:
        sample_json = json.load(sample_report)
        bundle = stix2_generator.parse_json_report_to_stix2_bundle(sample_json)

        for x in bundle.objects:
            if isinstance(x, stix2.Indicator):
                extracted_indicator_expressions.append(x.pattern)

    assert all(x in all_indicators_expressions for x in extracted_indicator_expressions)

created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_sha1,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_SHA1 = stix2.Relationship(indicator_SHA1, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_SHA1)
        bundle_objects.append(relationship_indicator_SHA1)

    if len(pattern_domain) != 0:
        stix2_domain = "".join(pattern_domain)
        stix2_domain = stix2_domain[:-4]

        indicator_DOMAINS = stix2.Indicator(
            name=TITLE + " - DOMAINS",
            created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_domain,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_DOMAINS = stix2.Relationship(indicator_DOMAINS, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_DOMAINS)
        bundle_objects.append(relationship_indicator_DOMAINS)

    if len(pattern_url) != 0:
        stix2_url = "".join(pattern_url)
        stix2_url = stix2_url[:-4]

created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_url,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_URLS = stix2.Relationship(indicator_URLS, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_URLS)
        bundle_objects.append(relationship_indicator_URLS)

    if len(pattern_ip) != 0:
        stix2_ip = "".join(pattern_ip)
        stix2_ip = stix2_ip[:-4]

        indicator_IPS = stix2.Indicator(
            name=TITLE + " - IPS",
            created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_ip,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_IPS = stix2.Relationship(indicator_IPS, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_IPS)
        bundle_objects.append(relationship_indicator_IPS)

    if len(pattern_email) != 0:
        stix2_email = "".join(pattern_email)
        stix2_email = stix2_email[:-4]

# add all indicators to STIX 1.2
    wrapper.add_indicator(indicatorHASH)
    wrapper.add_indicator(indiDOMAIN)
    wrapper.add_indicator(indiURL)
    wrapper.add_indicator(indiIP)
    wrapper.add_indicator(indiEMAIL)

    ########################
    # prepare for STIX 2
    bundle_objects = [campaign_MAIN, marking_def_white]

    if len(pattern_sha256) != 0:
        stix2_sha256 = "".join(pattern_sha256)
        stix2_sha256 = stix2_sha256[:-4]

        indicator_SHA256 = stix2.Indicator(
            name=TITLE + " - SHA256",
            created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_sha256,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_SHA256 = stix2.Relationship(indicator_SHA256, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_SHA256)
        bundle_objects.append(relationship_indicator_SHA256)

    if len(pattern_md5) != 0:
        stix2_md5 = "".join(pattern_md5)
        stix2_md5 = stix2_md5[:-4]

created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_md5,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_MD5 = stix2.Relationship(indicator_MD5, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_MD5)
        bundle_objects.append(relationship_indicator_MD5)

    if len(pattern_sha1) != 0:
        stix2_sha1 = "".join(pattern_sha1)
        stix2_sha1 = stix2_sha1[:-4]

        indicator_SHA1 = stix2.Indicator(
            name=TITLE + " - SHA1",
            created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_sha1,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_SHA1 = stix2.Relationship(indicator_SHA1, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_SHA1)
        bundle_objects.append(relationship_indicator_SHA1)

    if len(pattern_domain) != 0:
        stix2_domain = "".join(pattern_domain)
        stix2_domain = stix2_domain[:-4]

created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_ip,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_IPS = stix2.Relationship(indicator_IPS, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_IPS)
        bundle_objects.append(relationship_indicator_IPS)

    if len(pattern_email) != 0:
        stix2_email = "".join(pattern_email)
        stix2_email = stix2_email[:-4]

        indicator_EMAILS = stix2.Indicator(
            name=TITLE + " - EMAILS",
            created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_email,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_EMAILS = stix2.Relationship(indicator_EMAILS, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_EMAILS)
        bundle_objects.append(relationship_indicator_EMAILS)

    # creo il bunble STIX 2
    bundlestix2 = stix2.Bundle(objects=bundle_objects)

    if (ioccount > 0):

created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_sha256,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_SHA256 = stix2.Relationship(indicator_SHA256, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_SHA256)
        bundle_objects.append(relationship_indicator_SHA256)

    if len(pattern_md5) != 0:
        stix2_md5 = "".join(pattern_md5)
        stix2_md5 = stix2_md5[:-4]

        indicator_MD5 = stix2.Indicator(
            name=TITLE + " - MD5",
            created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_md5,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_MD5 = stix2.Relationship(indicator_MD5, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_MD5)
        bundle_objects.append(relationship_indicator_MD5)

    if len(pattern_sha1) != 0:
        stix2_sha1 = "".join(pattern_sha1)
        stix2_sha1 = stix2_sha1[:-4]

relationships = _environ.relationships
related_to = _environ.related_to
save = _environ.add
add_filters = _environ.add_filters
add_filter = _environ.add_filter
parse = _environ.parse
add_data_source = _environ.source.add_data_source
add_data_sources = _environ.source.add_data_sources


# Wrap SDOs with helper functions


STIX_OBJS = [
    _AttackPattern, _Campaign, _CourseOfAction, _Identity,
    _Indicator, _IntrusionSet, _Malware, _ObservedData, _Report,
    _ThreatActor, _Tool, _Vulnerability,
]

STIX_OBJ_DOCS = """

.. method:: created_by(*args, **kwargs)

        {}

.. method:: relationships(*args, **kwargs)

        {}

.. method:: related(*args, **kwargs)

        {}

created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_domain,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_DOMAINS = stix2.Relationship(indicator_DOMAINS, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_DOMAINS)
        bundle_objects.append(relationship_indicator_DOMAINS)

    if len(pattern_url) != 0:
        stix2_url = "".join(pattern_url)
        stix2_url = stix2_url[:-4]

        indicator_URLS = stix2.Indicator(
            name=TITLE + " - URL",
            created=timestamp,
            modified=timestamp,
            description=DESCRIPTION,
            labels=["malicious-activity"],
            pattern=stix2_url,
            object_marking_refs=[marking_def_white]
        )
        relationship_indicator_URLS = stix2.Relationship(indicator_URLS, "indicates", campaign_MAIN)
        bundle_objects.append(indicator_URLS)
        bundle_objects.append(relationship_indicator_URLS)

    if len(pattern_ip) != 0:
        stix2_ip = "".join(pattern_ip)
        stix2_ip = stix2_ip[:-4]