[Tutor] how to change some words in a text file

[Emile van Sebille]

On 3/28/2010 2:23 PM Shurui Liu (Aaron Liu) said...
> Here's the thing, I wanna change some wrong words from a text file like this:
>
> "I am a studaet." ->  "I am a student."
>
> I have tried to use this command:
> str = "I am a studaet."
> newstr = str[0:8] + "ent"
> print newstr
>
>
> But the system said     TypeError: 'type' object is unsubscriptable
>
> What's wrong?
>
str is an unfortunate variable name choice -- try oldstr instead.  What 
you've done is often called shadowing.  I don't get the error here, but 
I'm guessing that's because I'm on 2.6 and you're on 3.x?

Emile