Print a certain string only the first time it appears in a test file

[bowlofred]

I want to print the List of ARFCNs which is available numerous times in the text.

I find it odd that you pasted such a large text segment, but I only see one line with "List of ARFCNs", so when I run your program, I don't really see the problem.

How can I modify the code so that it prints the list only the first time it appears in text

Once you find the match you want, break out of the loop.

and also counts the number of entries in the list?

Split the line on =, then for the second part, split it into a list on spaces. You can then keep the entries around and count them with len()