List some things that to make it less verbose and more robust

Question

I am quite new in django forms. I am woking on problem where in function name generate_outage_form passed two parameters name settings and segment Now I have to make function less verbose and more robust.

def generate_outage_form(settings, segment=None):
    form = None
    datacenters = settings.get('datacenters')
    datacenters = get_and_sort(datacenters, 'abbreviation')

    departments = settings.get('departments')
    departments = get_and_sort(departments, 'name')

    outage_types = settings.get('outage_types', [])
    outage_causes = settings.get('outage_causes', [])
    outage_impacts = settings.get('outage_impacts', [])

    # Put a check to determine what form should be shown
    if not segment:
        if session.get('division'):
            dc_search = re.search(r'global dc', session.get('division'), re.I)
            ent_search = re.search(r'support', session.get('division'), re.I)
            if dc_search:
                form = forms.RecordDCOutage()
                segment = 'datacenter'
            if ent_search:
                form = forms.RecordSupportOutage()
                segment = 'support'
            if not form:
                form = forms.RecordDCOutage()
                segment = 'datacenter'
        else:
            form = forms.RecordSupportOutage()
            segment = 'support'
    else:
        if segment == 'datacenter':
            form = forms.RecordDCOutage()
        elif segment == 'support':
            form = forms.RecordSupportOutage()
        else:
            form = forms.RecordSupportOutage()
            segment = 'support'

    form.outage_type.choices = [
        (
            i_type.get('name'),
            i_type.get('name')
        ) for i_type in outage_types if (
            i_type.get('active') and i_type.get(segment)
        )
    ]
    form.outage_type.choices.insert(0, ('', ''))
    form.outage_cause.choices = [
        (
            cause.get('name'),
            cause.get('name')
        ) for cause in outage_causes if (
            cause.get('active') and cause.get(segment)
        )
    ]
    form.outage_cause.choices.insert(0, ('', ''))
    form.outage_impact.choices = [
        (
            impact.get('name'),
            impact.get('name')
        ) for impact in outage_impacts if (
            impact.get('active') and impact.get(segment)
        )
    ]
    form.outage_impact.choices.insert(0, ('', ''))
    form.data_center.choices = [
        (
            dc.get('abbreviation'),
            '%s - %s' % (
                dc.get('abbreviation'),
                dc.get('name')
            )
        ) for dc in datacenters if dc.get('active')
    ]
    form.data_center.choices.insert(0, ('', ''))
    form.departments.choices = [
        (
            dept.get('name'),
            dept.get('name')
        ) for dept in departments if (
            dept.get('active') and dept.get(segment)
        )
    ]

    return form, segment