[Tutor] about calling external program in Python
Dear all,
I'm trying to call an executable program in Python. I did the following, but it doesn't work. Any help is appreciated.
os.system('C:\Program Files\EPANET2\epanet2d.exe C:\simulation test\Network3_1.inp C:\simulation test\Network3_1.out')
Thanks.
J.
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Re: [Tutor] about calling external program in Python
Dear all,
I tried the following:
>>> os.system(r'C:\\simulation test\\epanet2d.exe C:\\simulation test\\Network3_1.inp C:\\simulation test\\Network3_1.out')1>>> os.system('C:\simulation test\epanet2d.exe C:\simulation test\Network3_1.inp C:\simulation test\Network3_1.out')
1>>> os.system(r'C:\simulation test\epanet2d.exe C:\simulation test\Network3_1.inp C:\simulation test\Network3_1.out')1>>> os.system(r'"C:\simulation test\epanet2d.exe" "C:\simulation test\Network3_1.inp" "C:\simulation test\Network3_1.out"')
1
They all returned '1' in the interactive window and gave no result in the designated output folder. All I saw is a flash of the ms-dos black window and then disappeared.
I tried ms-dos command line, it works pretty good.
Thanks.
J.
On 5/17/06, w chun <[EMAIL PROTECTED]> wrote:
> I'm trying to call an executable program in Python. I did the following, but> it doesn't work. Any help is appreciated.
>> os.system('C:\Program Files\EPANET2\epanet2d.exe> C:\simulation test\Network3_1.inp C:\simulationtest\Network3_1.out')try putting an "r" in front of the string, i.e. os.system
(r'C:.).you mentioned "it doesn't work." what do you mean by that? in otherwords, what did the Python interpreter do... give an error, nothing,etc.?thanks,-wesley- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001 http://corepython.comwesley.j.chun :: wescpy-at-gmail.com
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Re: [Tutor] about calling external program in Python
I redid the following:
import osimport syssys.path.append('C:\Program Files\EPANET2')os.system('epanet2d.exe C:\simulation_test\Network3_1.inp C:\simulation_test\Network3_1.out')
and safed this as test.py
In the Pythonwin interface to run. I got nothing.
Then I added 'C:\Program Files\EPANET2' into the system path.
In the cmd line: I typed python c:\test.py. It ran and then gave the output.
Don' t know why command line works. but pythonwin interface failed .
Thanks.
J.
On 5/17/06, Alan Gauld <[EMAIL PROTECTED]> wrote:
"Mu Mu" <[EMAIL PROTECTED]> wrote in messagenews:[EMAIL PROTECTED]
...> I tried the following:> >>> os.system(r'C:\\simulation test\\epanet2d.exe C:\\simulation> test\\Network3_1.inp C:\\simulation test\\Network3_1.out')> 1Any non zero return value means that an error occurred.
The os.system call worked and the OS returned an error, whichusually means you got a path wrong or the user running puythondoesn't have access rights to the executable.> They all returned '1' in the interactive window and gave no result
> in the> designated output folder. All I saw is a flash of the ms-dos black> window> and then disappeared.>> I tried ms-dos command line, it works pretty good.What happens if you try it from the Start->Run dialog?
The CMD box may have some environment settings that are missingwhen Python runs.Alan G.___Tutor maillist -
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