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Full Discussion: Swapping or switching 2 lines using sed
Top Forums Shell Programming and Scripting Swapping or switching 2 lines using sed Post 302261017 by null7 on Sunday 23rd of November 2008 12:01:41 AM
Old 11-23-2008
I think i know whats the problem. i tried to print out the line number. it seems the script reads those files as one file. What can we do so that the script can read one file than loop for 2nd file? i try to put unix command but don't know how to pass the file variable to replace @Files. Any advise?

Quote:
ls file*.txt > list
for i in `cat list`
do
Perl script
done
Code:
perl -e'BEGIN {
  $Pattern = "4052010204";
  $Bak_ext = ".bak";
  @Files = glob "file*";
  #print "help $i";
  }
  #print "yihaa";
for (@Files) {
  $File = $_;
  open FH, $File or die "$File : $!\n";
  while (<FH>) {
  print "line $. " ;
    if ($. == 2 and (split)[3] == $Pattern) {
    print "hey this line no $. " ;
     close FH;
     local @ARGV = ($File);
     local $^I = $Bak_ext;
     local $/ = undef;
     while (<>) {
     s/
      \A(.*?\n)
        ((?:\S+\s+){3}$Pattern\b.*?\n)
        (.*?\n)
         /$1$3$2/xos;
         print;
      }
   }
  }
}'

output: Eg: each file contain 17 lines.
Quote:
line 1 line 2 line 3 line 4 line 5 line 6 line 7 line 8 line 9 line 10 line 11 line 12 line 13 line 14 line 15 line 16 line 17 line 18 line 19 line 20 line 21 line 22 line 23 line 24 line 25 line 26 line 27 line 28 line 29 line 30 line 31 line 32 line 33 line 34 line 35 line 36 line 37 line 38 line 39 line 40 line 41 line 42 line 43 line 44 line 45 line 46 line 47 line 48 line 49 line 50 line 51
rgrds.
 

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LEARN ABOUT DEBIAN

pyp

PYP(1)							      General Commands Manual							    PYP(1)

NAME

       pyp - The Pyed Piper: A Modern Python Alternative to awk, sed and Other Unix Text Manipulation Utilities

SYNOPSIS

       pyp [options] files ...

DESCRIPTION

       pyp,  the  Pyed Piper, is a command line tool for text manipulation. It is similar to awk and sed in functionality, but its subcommands are
       Python based, and thus more familiar to many programmers.

       It can operate both on a per-line base and on the complete input stream.  Different features can be pipelined in a single command by  using
       the pipe character familiar from shell commands.

       pyp  backs  up  its  input  for reruns with modified commands, and can save commands as macros. On the downside, the rerun feature makes it
       unsuitable for continuous pipe operation.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.	For a complete description, use --manual.

       -h, --help
	      Show this help message and exit.

       -m, --manual
	      Prints out extended help.

       -l, --macro_list
	      Lists all available macros.

       -s MACRO_SAVE_NAME, --macro_save=MACRO_SAVE_NAME
	      Saves current command as macro. use "#" for adding
	      comments	EXAMPLE:
	      pyp -s "great_macro # prints first letter" "p[1]".

       -f MACRO_FIND_NAME, --macro_find=MACRO_FIND_NAME
	      Searches for macros with keyword or user name.

       -d MACRO_DELETE_NAME, --macro_delete=MACRO_DELETE_NAME
	      Deletes specified public macro.

       -g, --macro_group
	      Specify group macros for save and delete; default is user.

       -t TEXT_FILE, --text_file=TEXT_FILE
	      Specify text file to load. For advanced users,
	      you should typically cat a file into pyp.

       -x, --execute
	      Execute all commands.

       -c, --turn_off_color
	      Prints raw, uncolored output.

       -u, --unmodified_config
	      Prints out generic PypCustom.py config file.

       -b BLANK_INPUTS, --blank_inputs=BLANK_INPUTS
	      Generate this number of blank input lines; useful for
	      generating numbered lists with variable 'n'.

       -n, --no_input
	      Use with command that generates output with no input;
	      same as --dummy_input 1.

       -k, --keep_false
	      Print blank lines for lines that test as False.
	      default is to filter out False lines from the output.

       -r, --rerun
	      Rerun based on automatically cached data from the last run.
	      Use this after executing "pyp", pasting input into the shell,
	      and hitting CTRL-D.

SEE ALSO

       awk(1), grep(1), sed(1).

AUTHOR

       pyp was written by Toby Rosen <tobyrosen@gmail.com>.

       This manual page was written by Khalid El Fathi <khalid@elfathi.fr>, for the Debian project (and may be used by others).

								  March 19, 2012							    PYP(1)
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