Calling a C program from a Python Script

Grant Edwards grante at
Thu Dec 9 20:26:49 CET 2004

On 2004-12-09, Brad Tilley <bradtilley at> wrote:
> Steven Bethard wrote:
>>>> for root, files, dirs in os.walk(path)
>>>>      for f in files:
>>>>          try:
>>>>              x = file(f, 'rb')
>>>>              data =
>>>>              x.close()
>> Remember that CPython is implemented in C, and so all the builtin types 
>> (including file) basically execute C code directly.  My experience with 
>> Python file objects is that they are quite fast when you're doing simple 
>> things like the example above.
> I'm dealing with a terabyte of files. Perhaps I should have mentioned that.

And you think you're going to read the entire file consisting
of terabytes of data into memory using either C or Python?
[That's the example you gave.]

Sounds like maybe you need to mmap() the files?

Or at least tell us what you're trying to do so we can make
more intelligent suggestions.

Grant Edwards                   grante             Yow!  I invented skydiving
                                  at               in 1989!

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