Python Subprocess causing latency with shell

Question

The code below works completely fine. However, once the subprocess is called and the external python script is executed it starts popping up rapidly a command prompt as the output of the script is plain text. However, we have tried everything to disable that pop up. We tried adding 'shell=False' and 'shell=None'. We even tried to edit the external script itself and modify its subprocess calls but it has none.

if os.path.exists(oldpath): shutil.copy(root.wgetdir + "\\" + root.website.get() + "\\" + item, keyworddir + "\\" + item)
            shellreturn = subprocess.check_output(["C:\Python34\python",root.wgetdir + "\html2text.py", keyworddir + "\\" + item])
            print(shellreturn)
            shelllist = shellreturn.decode().splitlines()

score 0 · Accepted Answer · answered May 14 '14 at 00:00

0

Thanks to the related post from @J.F. Sebastian, I was able to figure out how to eliminate the shell popup. Below is the code I used.

startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW      
shellreturn = subprocess.check_output(["C:\Python34\python", root.wgetdir + "\html2text.py", keyworddir + "\\" + item], startupinfo=startupinfo) #this could be any subprocess.

answered May 14 '14 at 00:00

Kyle

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use `r"C:\Python\n\f"` instead of `"C:\Python\n\f"`. The latter has literal newline (`"\n"`) in it. Use `os.path.join(keyworddir, item)` instead of `keyworddir + "\\" + item` – jfs May 14 '14 at 13:11

Python Subprocess causing latency with shell

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