os.write(dest, content)
if len(content) < width:
os.write(dest, ' ' * (width - len(content)))
- os.write(dest, sep)
+ if sep:
+ os.write(dest, sep)
def filter_output(src_out, src_err, dest_out, dest_err):
"""Transfer data from src_out to dest_out and src_err to dest_err via