python - 为什么我不必在调用 Python 脚本之前添加 'python'？

Question

我是编程新手，Python 是我的第一语言。我已经将 Python 添加到我的路径中，但是当我使用命令提示符时，我不必在 myscript.py 之前添加 python，这与我看到的许多教程相反。这是一个例子:

C:\User\MyName>Welcome.py
Welcome to Python
Python is fun

当我输入'python'时，出现后续错误:

C:\User\MyName>python Welcome.py
python: can't open file 'Welcome.py': [Errno 2] No such file or directory

我真的需要“ python ”吗？提前致谢!

Answer 1

如果您关注了 Python on Windows FAQ , 似乎标准的 Python 安装程序已经冒用了 associating .py files打开命令 ..\..\Python\python.exe "%1"%*.

How do I make Python scripts executable?

On Windows, the standard Python installer already associates the .py extension with a file type (Python.File) and gives that file type an open command that runs the interpreter (D:\Program Files\Python\python.exe "%1" %*). This is enough to make scripts executable from the command prompt as ‘foo.py’. If you’d rather be able to execute the script by simple typing ‘foo’ with no extension you need to add .py to the PATHEXT environment variable.

谁会想到!这与四年前我第一次在 Windows 机器上安装 Python 时的情况不同。