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Top Forums UNIX for Beginners Questions & Answers How to print 1 file then when finished another file prints beside it? Post 303038583 by bigvito19 on Friday 6th of September 2019 01:38:49 PM
Old 09-06-2019
How to print 1 file then when finished another file prints beside it?

I have 2 big files over 4Gbs each. I'm looking for a way to print 1 file, then when that file finish printing another file proceeds to print beside it and merge the lines together. How would to cmd or code this?

Code:
from itertools import izip_longest

with open("file1") as textfile1, open("file2") as textfile2:
 for x, y in izip_longest(textfile1, textfile2, fillvalue=""):
     x = x.strip()
     y = y.strip()
     print("{0}{1}".format(x, y))




My example: The first file on the left is already finished printing, then the second files prints next.


Code:
 
          df585a
          fd6330
          ab854a
          ede361
          aadc55
          e8d562
    a1d2d3
    f6ac4b
    73fd36
    c4e5a3
    f66a99
    0c11da


          df585a 
          fd6330 
          ab854a 
    a1d2d3ede361 
    f6ac4baadc55 
    73fd36e8d562 
    c4e5a3       
    f66a99       
    0c11da   


        
    a1d2d3df585a 
    f6ac4bfd6330 
    73fd36ab854a 
    c4e5a3ede361 
    f66a99aadc55 
    0c11dae8d562


Last edited by bigvito19; 09-08-2019 at 04:54 PM..
 

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merge(1)						      General Commands Manual							  merge(1)

NAME
merge - three-way file merge SYNOPSIS
file1 file2 file3 DESCRIPTION
combines two files that are revisions of a single original file. The original file is file2, and the revised files are file1 and file3. identifies all changes that lead from file2 to file3 and from file2 to file1, then deposits the merged text into file1. If the option is used, the result goes to standard output instead of file1. An overlap occurs if both file1 and file3 have changes in the same place. prints how many overlaps occurred, and includes both alterna- tives in the result. The alternatives are delimited as follows: lines in file1 lines in file3 If there are overlaps, edit the result in file1 and delete one of the alternatives. This command is particularly useful for revision control, especially if file1 and file3 are the ends of two branches that have file2 as a common ancestor. EXAMPLES
A typical use for is as follows: 1. To merge an RCS branch into the trunk, first check out the three different versions from RCS (see co(1)) and rename them for their revision numbers: 5.2, 5.11, and 5.2.3.3. File 5.2.3.3 is the end of an RCS branch that split off the trunk at file 5.2. 2. For this example, assume file 5.11 is the latest version on the trunk, and is also a revision of the "original" file, 5.2. Merge the branch into the trunk with the command: 3. File 5.11 now contains all changes made on the branch and the trunk, and has markings in the file to show all overlapping changes. 4. Edit file 5.11 to correct the overlaps, then use the command to check the file back in (see ci(1)). WARNINGS
uses the ed(1) system editor. Therefore, the file size limits of ed(1) apply to AUTHOR
was developed by Walter F. Tichy. SEE ALSO
diff3(1), diff(1), rcsmerge(1), co(1). merge(1)
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