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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 as_params(self):
 """ Returns the filters, orders, select, expands and search as query parameters :rtype: dict """

        params = {}
        if self.has_filters:
            params['$filter'] = self.get_filters()
        if self.has_order:
            params['$orderby'] = self.get_order()
        if self.has_selects:
            params['$select'] = self.get_selects()
        if self.has_expands:
            params['$expand'] = self.get_expands()
        if self._search:
            params['$search'] = self._search
            params.pop('$filter', None)
            params.pop('$orderby', None)
        return params