[Tutor] Nested, line by line, file reading

[jon vs. python]

Hi everyone,
I have a file with this content:

"1
1
1
1
1
1
1
2
1
1"

I wanted a little script that would print the line containing "2" and every
line containing "1" after it. I've tried this:

>>> def p():
    f = file("prueba.txt",'r')
    for startline in f.read():
        if startline.find("2") != -1:
            print startline
            for endline in f.read():
                if endline.find("1") != -1:
                    print endline
                    break
    f.close()


>>> p()
2

I found a way for doing it.

But still I don't really understand why I don't get two "1" lines printed.
It seems that every line is read in "for startline f.read()" so "for endline
in f.read()" will start reading but find no data, am I right?

Thanks, Jon.
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