()> not > and > or,优先级相同从左到右
print(x or y) # x为True返回x,x为假返回y
print(0 or 0) # 输出0
print(x and y) # x为真返回y,x为假返回x
print(2 or 1<3) # 2 print(2 or 1>3) #2 print(0 or 1<3) #True print(0 or 1>3) #False
格式化输出%
print("输出百分号:%%") #用一个%转义