os.path.join (folder, filename) ensures the path is correct for the system. On Windows, it uses backslashes (reports\summary.txt); on Linux and macOS it uses forward slashes (reports/summary.txt).

I am hoping someone can help me out here, I can't really find an AIX forum so I figured this was close =).<BR><BR>I am trying to install a python module / program on my AIX 5.2 ppc box called pexpect.