Hi
I have a legacy (FORTRAN) program called POLY.EXE which asks the user
interactively for three inputs (file names) from the keyboard. I
would like to run this program in batch and tried to replace the
interactive prompts with file names stored in a separate file using
this Python script:
import subprocess
try:
poly_file = file("poly_files.txt","r")
except:
print "Could not open input file"
else:
x = subprocess.Popen(args="poly.exe", stdin=poly_file)
x.wait()
poly_files.txt contains the three file names as follows:
polyin.dat
polyout.dat
polyout.plt
On execution, I get these error messages
Traceback (most recent call last):
File "C:/Projects/Active/Alun/test_poly.py", line 4, in -toplevel-
x = subprocess.Popen(args="poly.exe", stdin=poly_file)
File "C:\Python24\lib\subprocess.py", line 533, in __init__
(p2cread, p2cwrite,
File "C:\Python24\lib\subprocess.py", line 607, in _get_handles
c2pwrite = self._make_inheritable(c2pwrite)
File "C:\Python24\lib\subprocess.py", line 634, in _make_inheritable
DUPLICATE_SAME_ACCESS)
WindowsError: [Errno 6] The handle is invalid
So, it looks like something is wrong with the way I am redirecting
stdin, but I have no idea what the problem is. Any suggestions
gratefully received
Thanks in advance
Alun Griffiths
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