检查元组项是否存在
以下实例为学习检查某个元组项目是否存在，具体代码如下：
# Filename : example.py
# Author by : www.lidihuo.com
thistuple = ("apple", "banana", "cherry")
if "apple" in thistuple:
print("Yes, 'apple' is in the fruits tuple")
执行以上代码输出结果为：
# Filename : example.py
# Author by : www.lidihuo.com
Yes, 'apple' is in the fruits tuple
