[Tutor] How to write lines in a text file (GUI)
o0MB0o at hotmail.se
Tue Nov 29 20:24:24 CET 2011
>Note: I'm struggling to follow your code whilst reading on my phone so the
>following suggestions make no reference to your particular codebase
Okay I understand. Perhaps it doesn't matter.
>Let's first assume that all buttons could be pressed in any order,
>therefore given the following presses: but1, but2, but2, but3, we will have
>the first line with hi_1, the second line empty and the third line hi_3.
>Now I also assume that there >is no 'update file' button, therefore each
>press of a button needs to update the file making a change to a single
>line. That sounds to me like a good use for an update_file function that
>accepts a parameter of which line should be updated. >So the main challenge
>is to write a function that can read/write to a file certain data depending
>on the argument passed. The function should:
>Identify line to be changed
>If line empty
>Change line to hi_#
>When you open a file, you could then use the read function to read the
>whole file, or you could use the readlines function to read the file line
>by line. Experiment with both, see what data types they both return and
>decide which is most >suitable. Bear in mind you need to easily
>differentiate each line and access them individually.
>If your still struggling to write this function, show us how far you get
>and we can go from there.
Actually, I nearly know how do to solve this problem. I just have one
problem. Can I use writeline() to write text into line 3 or line 5 for
Say that I want to write the text "hi" into line five of a text file, can I
do this using writeline(), if so, how ?
Thanks for the response!
Hope this helps,
Sent from my BlackBerry® wireless device
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