ตั้งชื่อจำนวนรุ่นทั้งหมดสำหรับ amd opteron dual-core 2.6ghz
Name the total number of model for amd opteron dual-core 2.6ghz
df = pd.DataFrame(columns = ['model___computer_name', 'cpu_type'])
df[df['cpu_type'] == 'AMD Opteron dual-core 2.6GHz']['model___computer_name'].count()