Terry Reedy wrote:
megastring = 100*'a' # t 1 sec on my machine
(other than keep appending to a string until it reaches 1MB len)?
You mean like (unexecuted)
s = ''
for i in xrange(100): s += 'a' #?
This will allocate, copy, and deallocate 100 successively longer
temporary
My goal is very simple. Have a mechanism to create sparse files and
modify them by writing arbitratry ranges of bytes at arbitrary offsets.
I did get the information I want (xrange instead of range, and a simple
way to generate 1Mb string in memory). Thanks for pointing out about
using len as
[EMAIL PROTECTED] [EMAIL PROTECTED] writes:
My goal is very simple. Have a mechanism to create sparse files and
modify them by writing arbitratry ranges of bytes at arbitrary offsets.
I did get the information I want (xrange instead of range, and a simple
way to generate 1Mb string in
[EMAIL PROTECTED] wrote]
Hi,
Is there any special support for sparse file handling in python? My
initial search didn't bring up much (not a thorough search). I wrote
the following pice of code:
options.size = 6442450944
options.ranges = [4096,1024,3,314572800]
fd = open(testfile,
In [EMAIL PROTECTED],
[EMAIL PROTECTED] wrote:
options.size = 6442450944
options.ranges = [4096,1024,3,314572800]
fd = open(testfile, w)
fd.seek(options.size-1)
fd.write(a)
for drange in options.ranges:
off = int(drange.split(,)[0])
len = int(drange.split(,)[1])
print off
[EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Is there any special support for sparse file handling in python?
Since I have not heard of such in several years, I suspect not. CPython,
normally compiled, uses the standard C stdio lib. If your system+C has a
sparseIO lib, you
Thanks for the info on xrange. Writing single char is just to get going
quickly. I knew that I would have to improve on that. I would like to
write chunks of 1MB which would require that I have 1MB string to
write. Is there any simple way of generating this 1MB string (other
than keep appending
[EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Thanks for the info on xrange. Writing single char is just to get going
quickly. I knew that I would have to improve on that. I would like to
write chunks of 1MB which would require that I have 1MB string to
write. Is there any
[EMAIL PROTECTED]
Is there any simple way of generating this 1MB string (other than keep
appending to a string until it reaches 1MB len)?
You might of course use 'x' * 100 for fairly quickly generating a
single string holding one million `x'.
Yet, your idea of generating a sparse file is
On 17 Aug 2005 11:53:39 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Hi,
Is there any special support for sparse file handling in python? My
initial search didn't bring up much (not a thorough search). I wrote
the following pice of code:
options.size = 6442450944
options.ranges =
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