DHT11 sensor - script problem

Hello,
I’m having some troubles when trying to read DHT sensor data. I’m trying to run grove_dht_example1.py with only response [’‘time and date’’][waiting for buffer to fill]. When I’m trying “Advanced_RGB_LCD_TempAndHumidity” project in pdb debug mode, script stops on line [ temp,hum ] = dht(dht_sensor_port,0). Any ideas please?