[docs] Documentation error: 2.2.2. Executable Python Scripts

Fabrizio Marana fabrizio.marana at gmail.com
Sat Nov 20 18:05:37 CET 2010

Dear Sir/Madam,

*In section 2.2.2. on page
http://docs.python.org/py3k/tutorial/interpreter.html you mention "On
Windows systems, there is no notion of an “executable mode” ".**
This is wrong.  Since Windows NT4 and onwards, there is a notion of a "path
extension", which is similar to the Unix executable mode, but invoked

1. Using the GUI:
a. Right-click on "My computer"
b. go to "properties"
c. go to "environment variables" (dependent on the OS: NT 4.0, W2K, XP,
Vista, W7)
d. add the string ";PY" to the end of the existing string
2. Using the Command line (temporary for that command interpreter only until
it is exited)
At the CLI (cmd.exe; commnd.com) ">" type:

Python executables can now be executed on a command line without
specifically invoking the Python interpreter as the Python installer
automatically associates .py files with python.exe.  (Which is a

C:\Program Files\Python\Tools\Scripts>SET PATHEXT=%PATHEXT%;.PY
C:\Program Files\Python\Tools\Scripts>2to3.py
At least one file or directory argument required.
Use --help to show usage.


Fabrizio Marana
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