seldan24 wrote:
On Jul 15, 1:48 pm, Emile van Sebille <em...@fenx.com> wrote:
On 7/15/2009 10:23 AM MRAB said...
On Jul 15, 12:47 pm, Michiel Overtoom <mot...@xs4all.nl> wrote:
seldan24 wrote:
what can I use as the equivalent for the Unix 'fold' command?
def fold(s,len):
while s:
print s[:len]
s=s[len:]
<snip>
You might still need to tweak the above code as regards how line endings
are handled.
You might also want to tweak it if the strings are _really_ long to
simply slice out the substrings as opposed to reassigning the balance to
a newly created s on each iteration.
Emile
Thanks for all of the help. I'm almost there. I have it working now,
but the 'fold' piece is very slow. When I use the 'fold' command in
shell it is almost instantaneous. I was able to do the EBCDIC->ASCII
conversion usng the decode method in the built-in str type. I didn't
have to import the codecs module. I just decoded the data to cp037
which works fine.
So now, I'm left with a large file, consisting of one extremely long
line of ASCII data that needs to be sliced up into 35 character
lines. I did the following, which works but takes a very long time:
f = open(ascii_file, 'w')
while ascii_data:
f.write(ascii_data[:len])
ascii_data = ascii_data[len:]
f.close()
The 'write' method doesn't append any line ending, so that code gives
the same output as f.write(ascii_data).
I know that Emile suggested that I can slice out the substrings rather
than do the gradual trimming of the string variable as is being done
by moving around the length. So, I'm going to give that a try... I'm
a bit confused by what that means, am guessing that slice can break up
a string based on characters; will research. Thanks for the help thus
far. I'll post again when all is working fine.
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