text wrapping help

[Ryan K]

I'm trying to text wrap a string but not using the textwrap module. I
have 24x9 "matrix" and the string needs to be text wrapped according
to those dimensions. Is there a known algorithm for this? Maybe some
kind of regular expression? I'm having difficulty programming the
algorithm. Thanks,
Ryan

[Ryan K]

Re: text wrapping help

Okay, I was a little vague in my last post...the matrix is like a
Wheel of Fortune board and it knows nothing about newlines. After 24
characters it spills over onto the next line. Here is what I came up
with:

<pre>
## Wrap Text

def wrap_text(in_st r, chars_line):
""" wrap text """
spaces = 0
new_str = ""
tmp_str = ""
while True:
tmp_str = in_str[:chars_line]
if tmp_str[chars_line-1].isspace():
new_str += tmp_str
else:
spaces = 0
for ch in reversed(tmp_st r):
if ch.isspace():
break
spaces += 1
tmp_str = tmp_str[:chars_line-spaces]
tmp_str += " " * spaces
new_str += tmp_str
in_str = in_str[chars_line-spaces:]
if len(in_str) <= chars_line:
new_str += " " + in_str
break
return new_str


if __name__ == '__main__':

sample_text = """Personal firewall software may warn about the
connection IDLE makes to its subprocess using this computer's internal
loopback interface. This connection is not visible on any external
interface and no data is sent to or received from the Internet."""
print wrap_text(sampl e_text, 24)

</pre>

It doesn't even run but when I go through it interactively it seems
okay. Once again, any help is appreciated.


On Feb 28, 7:06 pm, "Ryan K" <ryankas...@gma il.comwrote:

I'm trying to text wrap a string but not using the textwrap module. I
have 24x9 "matrix" and the string needs to be text wrapped according
to those dimensions. Is there a known algorithm for this? Maybe some
kind of regular expression? I'm having difficulty programming the
algorithm. Thanks,
Ryan

[attn.steven.kuo@gmail.com]

Re: text wrapping help

On Feb 28, 4:06 pm, "Ryan K" <ryankas...@gma il.comwrote:

I'm trying to text wrap a string but not using the textwrap module. I
have 24x9 "matrix" and the string needs to be text wrapped according
to those dimensions. Is there a known algorithm for this? Maybe some
kind of regular expression? I'm having difficulty programming the
algorithm.

Try:

import re
sample_text = """Personal firewall software may warn about the
connection IDLE makes to its subprocess using this computer's internal
loopback interface. This connection is not visible on any external
interface and no data is sent to or received from the Internet."""

# assume 24 is sufficiently wide:

lines = map(lambda x: x.rstrip(),
re.findall(r'.{ 1,24}(?:(?<=\S) \s|$)', sample_text.rep lace("\n", " ")))

print "\n".join(lines )


--
Hope this helps,
Steven

[Ryan K]

Re: text wrapping help

That works great but I need to replace the newlines with 24-(the index
of the \n) spaces.



On Feb 28, 8:27 pm, attn.steven.... @gmail.com wrote:

On Feb 28, 4:06 pm, "Ryan K" <ryankas...@gma il.comwrote:
>

I'm trying to text wrap a string but not using the textwrap module. I
have 24x9 "matrix" and the string needs to be text wrapped according
to those dimensions. Is there a known algorithm for this? Maybe some
kind of regular expression? I'm having difficulty programming the
algorithm.

>
Try:
>
import re
sample_text = """Personal firewall software may warn about the
connection IDLE makes to its subprocess using this computer's internal
loopback interface. This connection is not visible on any external
interface and no data is sent to or received from the Internet."""
>
# assume 24 is sufficiently wide:
>
lines = map(lambda x: x.rstrip(),
re.findall(r'.{ 1,24}(?:(?<=\S) \s|$)', sample_text.rep lace("\n", " ")))
>
print "\n".join(lines )
>
--
Hope this helps,
Steven

[attn.steven.kuo@gmail.com]

Re: text wrapping help

On Feb 28, 5:50 pm, "Ryan K" <ryankas...@gma il.comwrote:

On Feb 28, 8:27 pm, attn.steven.... @gmail.com wrote:
>

Try:

>

import re
sample_text = """Personal firewall software may warn about the
connection IDLE makes to its subprocess using this computer's internal
loopback interface. This connection is not visible on any external
interface and no data is sent to or received from the Internet."""

>

# assume 24 is sufficiently wide:

>

lines = map(lambda x: x.rstrip(),
re.findall(r'.{ 1,24}(?:(?<=\S) \s|$)', sample_text.rep lace("\n", " ")))

>

print "\n".join(lines )

>

--
Hope this helps,
Steven

>
That works great but I need to replace the newlines with 24-(the index
of the \n) spaces.
>

Just left-justify to the appropriate width with
the the padding character you wanted:

equally_long_li nes = map(lambda x: x.ljust(24, ' '), lines)

print "\n".join(equal ly_long_lines)

--
Hope this helps,
Steven

[Bjoern Schliessmann]

Re: text wrapping help

Ryan K wrote:

It doesn't even run but when I go through it interactively it
seems okay. Once again, any help is appreciated.

I haven't tested yet, but why don't you make a list of words of the
text (with split), and then accumulate words in a list until the
next word would make the line too long. Then just join the word
list, fill with spaces until line end and start over.

Regards,


Björn

--
BOFH excuse #325:

Your processor does not develop enough heat.