Re: [Tutor] re Format a file

2009-02-27 Thread Alan Gauld 


prasad rao prasadarao...@gmail.com wrote 


 for line in so:
 if len(line)70:de.write(line+'\n')
  if len(line)70:
 da=textwrap.fill(line,width=60)
 de.write(da+'\n')


What happens if the line is exactly 70 characters long?
I think you want an else instead of the second if


--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

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Re: [Tutor] re Format a file

2009-02-27 Thread Kent Johnson 
On Fri, Feb 27, 2009 at 5:09 AM, prasad rao prasadarao...@gmail.com wrote:
 Hello
 Finally I  managed to writ a function to format a file.
 Thank to everybody for their tips.

 def mmm(a):
  import os,textwrap
  so=open(a)
  d=os.path.dirname(a)+os.sep+'temp.txt'
  de=open(d,'w')
  import textwrap
  for line in so:
  if len(line)70:de.write(line+'\n')

You are introducing an extra newline here, line already ends in a newline.

   if len(line)70:
  da=textwrap.fill(line,width=60)
  de.write(da+'\n')

Not sure if textwrap strips the trailing newline, if not, this is also
double-spacing.

Kent
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Re: [Tutor] re Format a file

2009-02-26 Thread John Fouhy 
2009/2/27 prasad rao prasadarao...@gmail.com:
 Hello
 I don't know why, but this I think going into infinite loop.
 I cant see anything wrong in it.
 Please show me where  the problem is.
[...]
  while len(line)60:
 tem=line[60:]
 try:
 ??? a,b=tem.split(' ',1)
 ??? de.write(line[:60]+a+'\n')
 ??? line=b
 except ValueError:pass

So you have a while loop, whose condition depends on line.

This will loop infinitely if the body of the loop does not change the
value of line.

Can you see how that could happen?

-- 
John.
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Re: [Tutor] re Format a file

2009-02-26 Thread Lie Ryan 
On Fri, 27 Feb 2009 09:59:40 +0530, prasad rao wrote:

 def myform(s):
  import os
  so=open(s)
  d=os.path.dirname(s)+os.sep+'temp.txt'
  de=open(d,'w')
  for line in so:
  while len(line)60:
  item=line[60:]
  try:
  a,b=tem.split(' ',1)

what is tem here? It must be a global, since I can't see any other 
reference to tem in the function definition. If tem is global, then the 
value of b (a.k.a. line) will never change (except for the first 
iteration)

  de.write(line[:60]+a+'\n')
  line=b
  except ValueError:
  pass
  de.write(line+'\n')
  so.close()
  de.close()
  os.remove(s)
  os.rename(d,s)

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