Court of King Arthur,
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
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