"argument of type 'int' is not iterable" appears when matching multiple conditions in Python

The error message appears as

n=input("要转换的温度选项;1，摄氏度转华氏度;2，华氏度转摄氏度:")
if n in (1）:
    S=input("摄氏度为：")
    H=1.8*float(S)+32
    print("华氏度为:",format(H))
elif n in (2):
    H=input("华氏度为：") 
    S=(float(H)-32)/1.8
    print("摄氏度为：",format(S))

Solution:
Change "if n in (1)" to "if n in ['1']"

n=input("要转换的温度选项;1，摄氏度转华氏度;2，华氏度转摄氏度:")
if n in ['1']:
    S=input("摄氏度为：")
    H=1.8*float(S)+32
    print("华氏度为:",format(H))
elif n in ['2']:
    H=input("华氏度为：") 
    S=(float(H)-32)/1.8
    print("摄氏度为：",format(S))