reading and removing first x bytes of a file

[bart_nessux]

Peter Hansen wrote:
> bart_nessux wrote:
> 
>> I have some Macbinary files on a PC. I want to recursively read these 
>> files and remove the first 128 bytes of the files if they contain the 
>> macbinary header info. I know how to read directories recursively, but 
>> how would I read the first 128 bytes of each file in the path?
> 
> 
> os.listdir() can return a list of the names in the path.  You
> can use os.path.isfile() to check that a given name doesn't
> refer to a subdirectory.
> 
> Once you've opened one of the files for reading, just use .read(128)
> to get a string containing the first 128 bytes from the file.
> 
> -Peter

Thanks Peter, the below code recursively read the first 128B... am I 
right in saying that? If so, now that I can read these bytes from all 
.bin files in a directory, what would be the safest and fastest way of 
removing them?

Bart

import os

def pc_macbinary_fix(path):
    for root, dirs, files in os.walk(path):
       for fname in files:
          bin = os.path.splitext(fname)
	 if bin[1] == '.bin':
             macbinary = file(os.path.join(root,fname), 'rb').read(128)
	    print "The file named:", fname, "contains: ", macbinary, "\n."

path = raw_input("Absolute path to the directory that contains the bin 
files: ")
pc_macbinary_fix(path)