<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def ExportModelOperationsMixin(model_name):
 """Returns a mixin for models to export counters for lifecycle operations. Usage: class User(ExportModelOperationsMixin('user'), Model):
 """

    # Force create the labels for this model in the counters. This
    # is not necessary but it avoids gaps in the aggregated data.
    model_inserts.labels(model_name)
    model_updates.labels(model_name)
    model_deletes.labels(model_name)

    class Mixin(object):
        def _do_insert(self, *args, **kwargs):
            model_inserts.labels(model_name).inc()
            return super(Mixin, self)._do_insert(*args, **kwargs)

        def _do_update(self, *args, **kwargs):
            model_updates.labels(model_name).inc()
            return super(Mixin, self)._do_update(*args, **kwargs)

        def delete(self, *args, **kwargs):
            model_deletes.labels(model_name).inc()
            return super(Mixin, self).delete(*args, **kwargs)
    return Mixin