The open
on the source file is unnecessary, since os.rename
only needs the source and destination paths to get the job done. Moreover, os.rename
always returns None
, so it doesn’t make sense to call open
on its return value.
import os
import sys
folder="E:/.../1936342-G/test"
for filename in os.listdir(folder):
infilename = os.path.join(folder,filename)
if not os.path.isfile(infilename): continue
oldbase = os.path.splitext(filename)
newname = infilename.replace('.grf', '.las')
output = os.rename(infilename, newname)
I simply removed the two open
. Check if this works for you.