String find and replace

[hokiegal99]

Thanks for the explanation, I can make it work this way:

import os, string
setpath = raw_input("Enter the path: ")
for root, dirs, files in os.walk(setpath):
    fname = files
    x = 'THIS'
    y = 'THAT'
    for fname in files:
       myfile = file(os.path.join(root,fname), 'r')
       mystr = myfile.read()
       myfile.close()
       search = string.find(mystr, x)
       if search >=1:
          string.replace(mystr, x, y)
          print "Replacing", x, "with", y, "in", fname

If only I could actually make the change to the files! It works in 
theory, but not in practice ;) Anyone recommend how to actual write the 
change to the file? I'm new to this, so be kind.

Thanks Everyone!!!



Geoff Gerrietts wrote:
> Quoting hokieghal99 (hokiegal99 at hotmail.com):
> 
>>import os, string
>>print " "
>>setpath = raw_input("Enter the path: ")
>>def find_replace(setpath):
>>   for root, dirs, files in os.walk(setpath):
>>      fname = files
>>      for fname in files:
>>         find = string.find(file(os.path.join(root,fname), 'rb').read(), 'THIS')
> 
>                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>                               this string is never bound to a name
>                               (ie, you never assign str=file(...).read())
> 
>>         print find
>>         if find >=1:
>>             replace = string.replace(str, 'THIS', 'THAT')
> 
>                                         ^^^
>                                      this name is currently bound to
>                                      the builtin function str()
> 
> 
>>find_replace(setpath)
>>print " "
> 
> 
> 
> You might consider the fragment below, instead. It's a couple lines
> longer, but safer (your .close() happens exactly when you want it to)
> and probably more readable.
> 
>    for root, dirs, files in os.walk(setpath):
>       fname = files
>       for fname in files:
>          myfile = file(os.path.join(root,fname), 'rb')
>          mystr = myfile.read()
>          myfile.close()
>          find = string.find(mystr, 'THIS')
>          print find
>          if find >=1:
>              replace = string.replace(mystr, 'THIS', 'THAT')
> 
> 
> Luck,
> --G.
>