File Handling Problem

[joy99]

Dear Group,

I have a file. The file has multiple lines. I want to get the line
number of any one of the strings.
Once I get that I like to increment the line number and see the string
of the immediate next line or any following line as output. The
problem as I see is nicely handled in list,

like list_one=["god","earth","sky","cloud","rain"]
list_one[0]="god"
list_one[2]="sky"

but can it be for string and file?

I can generally put a cursor and move it back and forth for my need
using index/find and then re. But, I was looking to use some built-in
methods. Can I use fileinput or ast? But, I was not finding any good
resources, using http://docs.python.org/library/fileinput.html#fileinput.input,
etc. did not help much.

If any one can kindly help me out.

Best Regards,
Subhabrata.

 

[Rami Chowdhury]

f = open("myfile.txt", "r")

list_one = f.read().splitlines()
f.close()

Or use f.readlines(), which would do the same thing IIRC?

Dear Group,

I have a file. The file has multiple lines. I want to get the line
number of any one of the strings.
Once I get that I like to increment the line number and see the string
of the immediate next line or any following line as output. The
problem as I see is nicely handled in list,

like list_one=["god","earth","sky","cloud","rain"]
list_one[0]="god"
list_one[2]="sky"

but can it be for string and file?

It's easy to read a file into a list.

f = open("myfile.txt", "r")
list_one = f.read().splitlines()
f.close()

 

[Tim Golden]

Or use f.readlines(), which would do the same thing IIRC?

No: readlines () retains the "\n"s; splitlines () loses them

TJG

 

[Rami Chowdhury]

No: readlines () retains the "\n"s; splitlines () loses them

Ah, thank you for the clarification!

 

[Chris Rebert]

On Fri, Sep 4, 2009 at 11:39 PM, SUBHABRATA

And one small question does Python has any increment operator like ++ in C.

No. We do x += 1 instead.

Cheers,
Chris

 

[joy99]

No. We do  x += 1  instead.

Cheers,
Chris
--http://blog.rebertia.com

Thanx for your kind reply.
Warm Regards,
Subhabrata.