A handle of flake8 fixes

from django.conf import settings

from django.db.backends.postgresql_psycopg2.schema import DatabaseSchemaEditor

from django.utils.functional import cached_property

class PostGISSchemaEditor(DatabaseSchemaEditor):

        kwargs['srid'] = self.srid

        if self.dim != 2:

            kwargs['dim'] = self.dim

        if self.spatial_index != True:

        if self.spatial_index is not True:

            kwargs['spatial_index'] = self.spatial_index

        if self.geography != False:

        if self.geography is not False:

            kwargs['geography'] = self.geography

        return name, path, args, kwargs