编写程序，检查字符串"Life is short. I use python”中是否包含字符串"python"，若包 含则替换为"Python"后输出新字符串，否则输出原字符串。

好的，我理解了你的问题。以下是Python代码实现：

s = "Life is short. I use python"

if "python" in s:
    s = s.replace("python", "Python")
    print(s)
else:
    print(s)

运行结果为:

Life is short. I use Python