[Tutor] substituting empty line with stuff

[Shantanoo Mahajan]

+++ Srinivas Iyyer [02-08-05 14:54 -0700]:
| Hello group:
| 
| I have a file (3339203 lines) that looks like this:
| 
| (col:1)    (col:2)     (col:3)
| AD134KL
|             XXXXX       XXXXX
|             Xaaaa       Xaaaa
|             Xbbbb       Xbbbb
| 
| AD144KL
|             YYYYY       YYYYY
|             Yaaaa       Yaaaa
| 
| Now I have to fill the rows in column 1 with their
| designated stuff:
| 
| AD134KL
| AD134KL     XXXXX       XXXXX
| AD134KL     Xaaaa       Xaaaa
| AD134KL     Xbbbb       Xbbbb
| AD144KL
| AD144KL     YYYYY       YYYYY
| AD144KL     Yaaaa       Yaaaa
| 
| 
| 
| My code: 
| 
| f1 = open('xx','r')
| meat = f1.readlines()
| 
| mind = []
| 
| for i in range(len(meat)):
|       if meat[i].startswith('AD'):
|                mind.append(i)
| 
| mind = [0,4]
| 
| for i in range(len(mind)):
|       k = i+1
|       l = mind[i]+1
|       j = mind[k]-1
|       print l,j
| 
| 1 3
| 
| Logic: Now I want to substitute 'AD134KL' between 0
| and 4 which is 1,2,and 3.  and move on..
| 
| After coming to this stage, I lost grip and I do not
| know what to do.. 
| 
| Can experts help me please. 
| 
| thank you
| srini 
| 

Maybe...

for x in open('_file_'):
        a=x.split()
        if len(a) == 1:
                b = a[0]
        else:
                print b,
        print x,



Regards,
Shantanoo