Python脚本的正确shebang
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Proper shebang for Python script
提问by Adam Matan
I'm usually using the following shebang declaration in my Python scripts:
我通常在我的 Python 脚本中使用以下 shebang 声明：
#!/usr/bin/python
Recently, I've came across this shebang declaration:
最近，我遇到了这个shebang声明：
#!/usr/bin/env python
In the script documentation, it was noted that using this form is "more portable".
在脚本文档中，有人指出使用这种形式“更便携”。
What does this declaration mean? How come there's a space in the middle of the path? Does it actually contribute to protability?
这个声明是什么意思？小路中间怎么会有空位？它真的有助于盈利吗？
采纳答案by jh314
#!/usr/bin/env python
is more portable because in general the program /usr/bin/envcan be used to "activate" the desired command without full path.
更便携，因为通常该程序/usr/bin/env可用于在没有完整路径的情况下“激活”所需的命令。
Otherwise, you would have to specify the full path of the Python interpreter, which can vary.
否则，您必须指定 Python 解释器的完整路径，该路径可能会有所不同。
So no matter if the Python interpreter was in /usr/bin/pythonor in /usr/local/bin/pythonor in your home directory, using #!/usr/bin/env pythonwill work.
因此，无论 Python 解释器是在您的主目录/usr/bin/python中/usr/local/bin/python还是在您的主目录中， using#!/usr/bin/env python都可以使用。
