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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
file writing

Posted by rick (rick), 10 October 2007
how to open a file,match some data from it,extract the data which matched and save/write it to another file?
for example in a fasta fomat DNA dequence,I want to remove all the header lines and store them to a separate file.

Posted by admin (Graham Ellis), 10 October 2007
Well .... this is the sort of thing you can do ....

open (FH,"") or die;
open (FHO,">") or die;
while (<FH>) {
       /Python/ and print FHO;

... but I am concerned that you'll really need to learn a lot more basics to tailor this to do what you need.   I can recommend either this or a good book, but learning all of Perl via a question and answer session isn't very practical.

Posted by KevinAD (KevinAD), 10 October 2007
I recommend anyone working with DNA stuff checks out bioperl:

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