!/usr/bin/env python3

print('hello, world')

然后，通过命令给hello.py以执行权限：

$ chmod a+x hello.py

./hello.py

#2 Created at ... [Delete] [Delete and Lock User]

少了个#吧？

不过，在mac命令行下，确实需要./xx.py来执行，谢谢指教，我刚才又直接去双击xx.py去了。。。。

#3 Created at ... [Delete] [Delete and Lock User]

求解，我在mac里执行显示：。／hello.py：no such file or direction 谢谢！

#4 Created at ... [Delete] [Delete and Lock User]

同问！请问解决了吗？我也是这个问题.／hello.py：no such file or direction 这么怎么解？