Question (Thai):  ผู้ที่ซื้อ Nest Thermostat เป็นผู้ดำเนินการตั๋วจำนวนเท่าใด
Question (English): How many ticket ID were conducted by the person who purchased Nest Thermostat?
Table: customer
Pandas: df[df['Product_Purchased'] == 'Nest Thermostat'].shape[0]