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Full Discussion: Merging two files
Top Forums Shell Programming and Scripting Merging two files Post 302774003 by summer_cherry on Friday 1st of March 2013 03:56:27 AM
Old 03-01-2013
awk, perl, python
awk
Code:
gawk -F"[|]" '{
if(NR==FNR){
  _[$1]=sprintf("%s,%s",_[$1],$2)
}
else{
  tmp=_[$1]
  n=split(tmp,arr,",")
  for(i=2;i<=n;i++){
    print $0"|"arr[i]
}
}
}
' b a

perl
Code:
open my $fh1,"<a.txt" or die "can not open a.txt";
open my $fh2,"<b.txt" or die "can not open b.txt";
my %hash;
while(<$fh2>){
	chomp;
	my @tmp = split("[|]",$_);
	push @{$hash{$tmp[0]}}, $tmp[1];
}
close $fh2;
while(<$fh1>){
	chomp;
	my @tmp = split("[|]", $_);
	my @tmp = @{$hash{$tmp[0]}};
	for(my $i=0;$i<=$#tmp;$i++){
		print $_,"|",$tmp[$i],"\n";
	}
}
close $fh1;

python
Code:
dict={}
with open("b.txt","r") as f1:
 for line in f1:
  s=line.replace("\n","")
  items=s.split("|")
  if items[0] in dict:
   dict[items[0]].append(items[1])
  else:
   dict[items[0]]=[items[1]]
with open("a.txt","r") as f2:
 for line in f2:
  s=line.replace("\n","")
  items=s.split("|")
  for i in dict[items[0]]:
   print(s,"|",i,sep="")

This User Gave Thanks to summer_cherry For This Post:
panyam
 

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LEARN ABOUT DEBIAN

gri_merge

GRI_MERGE(1)						      General Commands Manual						      GRI_MERGE(1)

NAME

       gri_merge - merge multiple Gri output files into a single PostScript file.

USAGE (style 1):
	      gri_merge [OPTIONS] CxR a.ps b.ps ... > merged_file.ps

       Merges  the  files  onto one page, in 'C' columns and 'R' rows.	The CxR files are given in the order of words on a page.  The page is pre-
       sumed to be 8.5x11in in size, as are all the input files, and the input files are sized to fit, and kept in natural scale.

USAGE (style 2):
	      gri_merge [OPTIONS] xcm ycm enlarge a.ps [b.ps ...] > merged_file.ps

       Where `enlarge' is a scale factor applied after offsetting `xcm' to the right and `ycm' upward.

   EXAMPLE (style 2):
	      The following

       gri_merge 2 12 .5 a.ps 

	      12 12 .5 b.ps 

	      2 2 .5 c.ps 

	      12 2 .5 d.ps > all.ps

       produces 4 panels from gri plots done using margins and sizes as specified in the following lines in a gri commandfile

	      set x margin 2

	      set x size 15

	      set y margin 2

	      set y size 15

       The OPTIONS, available if your 'perl' has 'getopts' library, are:

       -u graylevel -- set graylevel for underlay beneath panels, by default 0.75.

	      Values range from 0 (black) to 1 (white), although a value of precisely 1 means do NOT draw underlay.

       -b graylevel -- Set value for background under individual panels, again 0

	      for black to 1 for white, with 1 meaning no drawing.

       -h     -- Print this help message and quit.

SEE ALSO

       gri(1), gri_unpage(1)

gri_merge							       2009							      GRI_MERGE(1)
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