answer = 42

# type() 函数返回数据的类型
print(type(answer)) # <class 'int'>

if type(answer) is int:
 print("What's the question?")

# 当需要进行这种检查时,最好使用 isinstance() 而不是 type(),
# 因为 isinstance() 考虑了子类和继承
if isinstance(answer, int):
 print("What's the question?")