running non-python progs from python

[Fredrik Lundh]

Meanwhile, Fredo has provided a nice answer that WORKS...
along with an explanation of why my code didn't work.

for the benefit of others, maybe you could tell us why
your code didn't work?

</F>

 

[Mark]

In the command window the call to the program with the name of the ..mid
file to be played works just fine. Here is what it looks like....exactly:
C:\Python22>playb Canyon.mid

Here is the code used to call it from Python:
import os
filename = "C:\Python22\Canyon.mid"
os.system("C:\Python22\playb.exe%s"%filename)
...this causes a dos box to appear which promptly hangs and does nothing, at
which time Python stops responding. Vartiations on this will cause the dos
box to appear with the message "Bad command or file name".

Try:
import.os
os.system(r"C:\Python22\playb.exe %s"%filename)

or:
import os
os.system("C:\\Python22\\playb.exe %s"%filename)

-Mark

 

[Spiffy]

or:
import os
os.system("C:\\Python22\\playb.exe %s"%filename)

Thank you. Fedor had emailed me yesterday with this solution and a nice
explanation. Thanks to all who tried to help.

 

[Cameron Laird]

Thank you. Fedor had emailed me yesterday with this solution and a nice
explanation. Thanks to all who tried to help.

Did anyone ever disclose the solution publicly? This
case has me curious; os.system() misunderstandings
often arise, and I'd like to learn more about what can
go wrong.