Execution of Python script with parameter and Windows10 doesn't work

Question

I've got some Python scripts, which I used from cmd line or batch files or with drag&drop to do useful things.

Example:

makeMyWork.py "hi" 77

Now I got Win10 :-(

Windows10 doesn't forward the parameters to my python scripts. I have to write:

c:\Python27\python.exe makeMyWork.py "hi" 77

A lot of automatism isn't working anymore now. I started to change some important batch-files, but that's a lot of work. I want have back, the old behavior.

What can I do now ?

We cannot help you unless you post what is inside makeMyWork.py — Jason
– Jason, Commented Mar 15, 2016 at 16:12
Windows is not linux. Put the python location in your $PATH$ environment variable and you'll only have to type "python makeMyWork.py" — Goodies
– Goodies, Commented Mar 15, 2016 at 16:20
@Jason: Please read my question first. It's about the command line params are not passed to the python script. It's not about the content of the python script. — rundekugel
– rundekugel, Commented Sep 2, 2019 at 11:14
@Goodies: I've no problems of executing a script with python.exe. It's about the paramaters — rundekugel
– rundekugel, Commented Sep 2, 2019 at 11:14

Community · Accepted Answer · 2017-05-23 12:15:27Z

1

Sorry, after searching with Google instead of hulbee, I found the answer:

Windows is not passing command line arguments to Python programs executed from the shell

[HKEY_CLASSES_ROOT\Applications\python.exe\shell\open\command] @="\"C:\Python25\python.exe\" \"%1\" %*"

Thanks to mckoss

To make it working for me, I'd to use the registry path:

HKEY_CLASSES_ROOT\py_auto_file\shell\open\command

and added a %* to the parameter

edited May 23, 2017 at 12:15

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answered Mar 15, 2016 at 16:27

rundekugel

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3 Comments

Dr.CKYHC Jan 26 at 21:36

Not sure - why you've placed backslash-symbols in the answer. Actually the steps are: 1) Associate some python-script (i.e. *.py) with python.exe (assuming you like to see console-output during scripts execution, otherwise do similar with pythonw.exe ). 2) Open regedit and search for all matches of "python.exe" (without quotation marks) 3) By all matches ending with python.exe" "%1" - add single space-symbol and %* at the end, i.e. the result would look like: "C:\Python3\python.exe" "%1" %* Note: after first installation of python usually you would find exact 2 matches.

rundekugel May 21 at 14:52

to: Dr.CKYHC Why backslashes? They are needed sometimes, if you have spaces in path, you need double quotes, and this quotes must be escaped with a backslash.

Dr.CKYHC May 22 at 16:38

I've used the variant without backslashes before the arguments in the registry-command. It works also when I should give to python (or script) arguments containing spaces, just need to include them into double quotation marks, e.g. my_script.py "some argument with spaces" "another argument". In case the argument itself contains double quotation marks - they should be escaped extra. But probably I didn't catch a case, where variant without backslashes would be not enough :-D

andrewm · Accepted Answer · 2022-02-26 13:05:14Z

1

Step 1: Right click on a python script and use open-with to open with your python.exe

Step 2: Change registry so that running your python script from command line will cause python.exe to read individual arguments, and not to combine all arguments into a single string.

Note that due to Windows limits, only the first 8 arguments are available individually. Downside is os.argv will contains empty strings appended when less than 8 arguments. The alternative is to use %* which would join all arguments with spaces but make it available as sys.argv1

The fix is to add a code: while sys.argv[-1] == '': del sys.argv[-1]

Use Regedit, or save below to a .reg file, edit the path, then run it.

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Applications\python.exe\shell\open\command] @=""C:\Users\andrewm\anaconda3\python.exe" "%1" "%2" "%3" "%4" "%5" "%6" "%7" "%8" "

[HKEY_CLASSES_ROOT\py_auto_file\shell\open\command] @=""C:\Users\andrewm\anaconda3\python.exe" "%1" "%2" "%3" "%4" "%5" "%6" "%7" "%8" "

regedit

edited Feb 26, 2022 at 13:05

answered Feb 26, 2022 at 12:47

andrewm

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1 Comment

rundekugel Over a year ago

instead of : "%1" "%2" "%3" "%4" "%5" "%6" "%7" "%8" it's simpler, and uses all available params: " \"%1\" %*"

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