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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def parse_field(self, field_data, index=0):
 """Parse field and add missing options"""

        field = {
            '__index__': index,
        }

        if isinstance(field_data, str):
            field.update(self.parse_string_field(field_data))
        elif isinstance(field_data, dict):
            field.update(field_data)
        else:
            raise TypeError('Expected a str or dict get {}'.format(type(field_data)))

        if 'field' not in field:
            field['field'] = None

        if 'label' not in field and field['field']:
            try:
                field['label'] = self.object._meta.get_field(field['field']).verbose_name.capitalize()
            except Exception:
                field['label'] = field['field'].replace('_', '').capitalize()
        elif 'label' not in field:
            field['label'] = ''

        if 'format' not in field:
            field['format'] = '{0}'

        # Set default options
        for name, options in self.fields_options.items():
            if 'default' in options and name not in field:
                field[name] = options['default']

        return field