>> fd.write('0')
[cut]
>
> f = file('large_file.bin','wb')
> f.seek(409600000-1)
> f.write('\x00')
While a mindblowingly simple/elegant/fast solution (kudos!), the
OP's file ends up with full of the character zero (ASCII 0x30),
while your solution ends up full of the NUL character (ASCII 0x00):
[EMAIL PROTECTED]:~/temp$ xxd op.bin
0000000: 3030 3030 3030 3030 3030 0000000000
[EMAIL PROTECTED]:~/temp$ xxd new.bin
0000000: 0000 0000 0000 0000 0000 ..........
(using only length 10 instead of 400 megs to save time and disk
space...)
-tkc
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