Question

How do I code in python the option that when the output file exists in the path, the output file will automatically be “originalname”+”_1” / “originalname”+”_2” and so on ?

Answer 1

Something like

import os.path

def getnewfilename(filename):
    testfile = filename
    i = 0
    while os.path.exists(testfile):
        i += 1
        testfile = "%s_%s" % (testfile, i) 

    return testfile

This should generate

filename
filename_1
filename_2

if you use %s_%3i” you should get

filename
filename_001
filename_002
filename_003

which will then list alphabetically (but have problems when i>=1000)