[fledgeling]

import os
for i in range (100):
   cent=open ( str(i)+'.txt','w')
   cent.close()
   os.system(del str(i)+'txt')

it gives error cause del str(i)+'txt' is not a string..... how can i make this work ?

[sepp2k]

You're calling the del operator on your string and then you're passing the result (which will be None) to system. I imagine you didn't intent to use the del operator at all, but rather wanted to create a string that starts with "del " followed by the filename.

That said, you probably shouldn't be using system at all to delete files. That's what the os.remove function is for, which has the considerable upside that it works on all operating systems, even ones that don't have a command line utility called del.

[fledgeling]

sepp2k, on 18 November 2012 - 07:51 AM, said:

You're calling the del operator on your string and then you're passing the result (which will be None) to system. I imagine you didn't intent to use the del operator at all, but rather wanted to create a string that starts with "del " followed by the filename.

That said, you probably shouldn't be using system at all to delete files. That's what the os.remove function is for, which has the considerable upside that it works on all operating systems, even ones that don't have a command line utility called del.

thanks a lot
is there any way to achieve deleting all of the files created ( even after the loop) with os.system(del)
using the os.getcwd() and os.listdir() ?

[Python_4_President]

EDIT: Clearly I should drink more coffee.. Sorry for posting in old thread with duped answer.

Why use os.system when you could just use the cross-platform os.remove?

open("Hello.txt", 'w').write("Hello!")
os.remove("Hello.txt")

This post has been edited by Python_4_President: 27 November 2012 - 10:36 AM

[fledgeling]

Python_4_President, on 27 November 2012 - 10:22 AM, said:

Why use os.system when you could just use the cross-platform os.remove?

open("Hello.txt", 'w').write("Hello!")
os.remove("Hello.txt")

well i just had to do it with os.system for a homework and not with remove.... no matter how stupid it sounds
Anyway i figured out myself how to do it ... just for the record it goes like

import os

for i in range (100):

   cent=open ( str(i)+'.txt','w')

   cent.close()
   delete = str('del'+' '+str(i)+'.txt')
   os.system(delete)

[eGrove Systems]

import os

for i in range (100):

fil=open ( str(i)+'.txt','w')

fil.close() #delete the file through
del_fil = str('del'+' '+str(i)+'.txt')
os.system(del_fil)