How to: Pass Arguments to Python Script via Powershell

Question

I am attempting to pass 2 arguments to a python script via Powershell.

CODE:

$env:PATHEXT += ";.py"

[Environment]::SetEnvironmentVariable("Path", "$env:Path;c:\Program Files\lcpython15\", "User") 

$args1 = "Test1"
$args2 = "Test2"
$Python_SetAttrib = "c:\ProgramData\set_cust_attr.py "

python $Python_SetAttrib $args1 $args2

USAGE FROM CMD.exe: 
c:\ProgramData\set_cust_attr.py <custom attribute name> <custom attribute value>

ERROR:

PS C:\ProgramData> python $Python_SetAttrib + $args1 +  $args2
usage: c:\ProgramData\set_cust_attr.sh <custom attribute name> <custom attribute value>
OR
usage: c:\ProgramData\Opsware\set_cust_attr.sh --valuefile <path to file with value     in     it> <custom attribute name>

python.exe : Got more than one custom attribute name.
At line:1 char:7
+ python <<<<  $Python_SetAttrib + $args1 +  $args2
    + CategoryInfo          : NotSpecified: (Got more than one custom attribute     name.:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError

Unhandled exception in thread started by 
Traceback (most recent call last):
  File ".\client\__init__.py", line 88, in pumpthread
  File "C:\Program Files\lcpython15\lib\site-packages\pythoncom.py", line 3, in ?
    pywintypes.__import_pywin32_system_module__("pythoncom", globals())
  File "C:\Program Files\lcpython15\Lib\site-packages\win32\lib\pywintypes.py", line     68, in __import_pywin32_system_module__
    import _win32sysloader
ImportError: No module named _win32sysloader

Judging from the error message, the issue seems to be with your Python code, not with your PowerShell code. — Ansgar Wiechers
– Ansgar Wiechers, Commented Jul 2, 2013 at 12:34
Why are you using the + operator between the parameters (python $Python_SetAttrib + $args1 + $args2)? Do you want to concatenate the arguments (if so, you'd need to surround them with parens, ($Python_SetAttrib + $args1 + $args2))? If not, I don't know what you mean. If you mean for them to be separate parameters to the python script, then you wouldn't need + at all. — mojo
– mojo, Commented Jul 2, 2013 at 13:44
When I pass the parameters via ( ) it gives me : " Unexpected token 'args1' in expression or statement." — user2542412
– user2542412, Commented Jul 2, 2013 at 15:39
Currently there is a .bat to run python and the script. So, it would works if I run (at cmd line) : attrib.bat <arg1> <arg2> The .bat just contains : : python.exe <python script.py> I'm trying to not use the .bat file by calling: python.exe <python script> <arg1> <arg2> — user2542412
– user2542412, Commented Jul 2, 2013 at 15:43
For clarity: python c:\ProgramData\set_cust_attr.py + $args1 + $args2 calls set_cust_attr.py with 4 arguments: +, $args1, + and $args2. — Ansgar Wiechers
– Ansgar Wiechers, Commented Jul 2, 2013 at 21:28

user2542412 · Accepted Answer · 2013-07-03 19:14:00Z

1

Got it! Darn single quotes.....

$env:Path += ";c:\Program Files\lcpython15";
$env:PATHEXT += ";.py"; 
$arg1 = "Test3" 
$arg2 = "Testing" 
$arg3 = 'c:\ProgramData\set_cust_attr.py' 
python $arg3 $arg1 $arg2

answered Jul 3, 2013 at 19:14

user2542412

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