In order to get some logs when this method is being executed, perform the following steps:

1. At the beginning of the code, import the logging module:

import logging 

2. Before the definition of the model class, get a logger for the module:

_logger = logging.getLogger(__name__) 

3. Modify the code of the export_stock_level() method, as follows:

    @api.model 
    def export_stock_level(self, stock_location): 
        _logger.info('export stock level for %s',
                      stock_location.name)
        products = self.with_context(
             location=stock_location.id).search([]) 
        products = products.filtered('qty_available') 
        _logger.debug('%d products in the location',
                      len(products)) 
        fname = join(EXPORTS_DIR, 'stock_level.txt') 
        try: 
            with open(fname, 'w') as fobj: 
                for prod in products: 
                    fobj.write('%s	%f
' % (
                        prod.name, prod.qty_available)) 
        except IOError: 
            _logger.exception( 
                'Error while writing to %s in %s', 
                'stock_level.txt', EXPORTS_DIR) 
            raise exceptions.UserError('unable to save file')