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# Serializer

class PinnedAppsSerizalazer(serializers.Serializer):
    app = serializers.ListField(
        child=serializers.CharField()
    )


# View
class PinnedAppView(APIView):

    def get(self, request):
        pinned_apps = ['a', 'b', 'c', 'd']
        serializer = PinnedAppsSerizalazer(pinned_apps, many=True)
        return Response(serializer.data)

# Error
Exception Type:	AttributeError
Exception Value:
Got AttributeError when attempting to get a value for field `app` on serializer `PinnedAppsSerizalazer`.
The serializer field might be named incorrectly and not match any attribute or key on the `str` instance.
Original exception text was: 'str' object has no attribute 'app'.