a string problem

[MTD]

> When i specify i only want to print the lines that contains "string" ie
> the first line and not the others. If i use re module, how to compile
> the expression to do this? I tried the re module and using simple
> search() and everytime it gives me all the 3 lines that have "string"
> in it, whereas i only need line 1.

That's because all three lines DO include the substring "string"