python3基础3-if操作

#coding:utf-8
#允许汉语注释
#if
test = ['mushrooms', 'mushrooms', 'pineapple']
if test[0]==test[1]:
    print("ok")
else:
    print("no ok")

#检查某个元素是否在list里面
t = 'pineapple' in test
if t==True:
    print("true")

if 'pineapple1' not in test:
    print("true")

#检查list是否为空
if test:
    print("no empty")
else:
    print("empty")

age = 18
if age < 4:#在条件测试的格式设置方面，PEP 8提供的唯一建议是，在诸如== 、>= 和<= 等比较运算符两边各添加一个空格

    print("Your admission cost is $0.")
elif age < 18:
    print("Your admission cost is $5.")
else:
    print("Your admission cost is $10.")