Training, Open Source computer languages
PerlPHPPythonMySQLApache / TomcatTclRubyJavaC and C++LinuxCSS 
Search for:
Home Accessibility Courses Diary The Mouth Forum Resources Site Map About Us Contact
For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
reading particular lines of a file

Posted by Indrasen (Indrasen), 13 September 2007
Hi all,

I am new to this forum and I have a small problem while reading a file...

i want to avoid read some lines in a file and ignore the rest like say..

P0>  0x0 0x00022597 : * 31 C0 : 2
      XOR EAX, EAX

     P0>RAX: 0x00000000
     P0>EIP: 0x00022599

i dont want to read line starting with P0> but want to read line after can this be done ? some one please help me

Posted by admin (Graham Ellis), 13 September 2007
Unless you know exactly where you want to read from in the file (in terms of the number of bytes of data in), you cannot avoid reading the PO> lines.   What you should do is to read all the lines in a loop, and use an if command within the loop to skip over the lines you want to ignore.

Posted by Indrasen (Indrasen), 20 September 2007
Hi Graham,

Thanks for your reply, I was able to do that using the folowing command....

if {[regexp "P0>(.*)\$" $line] == 0} {

to skip multiple lines i am using multiple if statements...

This page is a thread posted to the opentalk forum at and archived here for reference. To jump to the archive index please follow this link.

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2022: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 793803 • EMAIL: • WEB: • SKYPE: wellho