On 02/01/2015 19:44, Ken Stewart wrote:
Court of King Arthur,
Court of BDFL actually.
I’d appreciate any help you can provide. I’m having problems passing
command line parameters from Windows 7 into a Python script (using
Python 3.4.2). It works correctly when I call the interpreter
explicitly from the Windows command prompt, but it doesn’t work when I
enter the script name without calling the Python interpreter.
This works:
python myScript.py arg1 arg2 arg3
This doesn’t work:
myScript.py arg1 arg2 arg3
The Windows PATH environment variable contains the path to Python, as
well as the path to the Script directory. The PATHEXT environment
variable contains the Python extension (.py).
There are other anomalies too between the two methods of invoking the
script depending on whether I include the extension (.py) along with the
script name. For now I’m only interested in passing the arguments
without explicitly calling the Python interpreter.
************************************
Here is the script:
#! python
import sys
def getargs():
sys.stdout.write("\nHello from Python %s\n\n" % (sys.version,))
print (' Number of arguments =', len(sys.argv))
print (' Argument List =', str(sys.argv))
if __name__ == '__main__':
getargs()
************************************
Result_1 (working correctly):
C:\Python34\Scripts> python myScript.py arg1 arg2 arg3
Hello from Python 3.4.2 (v3.4.2:ab2c023a9432, Oct 6 2014, 22:15:05)
[MSC v.1600 32 bit (Intel)]
Number of arguments = 4
Argument List = ['myScript.py', 'arg1', 'arg2', 'arg3']
************************************
Result_ 2 (Fail)
C:\Python34\Scripts> myScript.py arg1 arg2 arg3
Hello from Python 3.4.2 (v3.4.2:ab2c023a9432, Oct 6 2014, 22:15:05)
[MSC v.1600 32 bit (Intel)]
Number of arguments = 1
Argument List = ['C:\\Python34\\Scripts\\myScript.py']
As a beginner I’m probably making a mistake somewhere but I can’t find
it. I don’t think the shebang does anything in Windows but I’ve tried
several variations without success. I’ve tried writing the script using
only commands, without the accouterments of a full program (without the
def statement and without the if __name__ == ‘__main__’ …) to no avail.
I’m out of ideas. Any suggestions?
Ken Stewart
Works fine for me with this:-
c:\Users\Mark\Documents\MyPython>assoc .py
.py=Python.File
c:\Users\Mark\Documents\MyPython>assoc .pyw
.pyw=Python.NoConFile
c:\Users\Mark\Documents\MyPython>ftype Python.File
Python.File="C:\Windows\py.exe" "%1" %*
c:\Users\Mark\Documents\MyPython>ftype Python.NoConFile
Python.NoConFile="C:\Windows\pyw.exe" "%1" %*
c:\Users\Mark\Documents\MyPython>set pathext
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY
This is set up by the Python Launcher for Windows, introduced in 3.3,
see https://docs.python.org/3/using/windows.html#launcher, noting that
shebang lines also work.
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
--
https://mail.python.org/mailman/listinfo/python-list
