Help with python code to search string in one file & replace with line in other file

[Larz60+]

OK, re-do everything in post 15.
This will work in python 2.7, but you have to run from the command line like:

c:\Python27\python.exe SwapHeaders.py -i 'File1.txt' -b 'File2.txt' -o 'Fileout.txt'

replacing the python command to point to your python 2.7 directory
and changing file names as appropriate.

running:

c:\Python27\python.exe SwapHeaders.py -h

As an aid, will give you:

Output:
usage: SwapHeaders.py [-h] [-i ORIGINAL_FILENAME]
                      [-b REPLACE_ORIGINAL_FILENAME] [-o OUT_FILENAME]

optional arguments:
  -h, --help            show this help message and exit
  -i ORIGINAL_FILENAME, --ifile ORIGINAL_FILENAME
                        Filename where headers are to be replaced
  -b REPLACE_ORIGINAL_FILENAME, --bfile REPLACE_ORIGINAL_FILENAME
                        Filename containing body
  -o OUT_FILENAME, --ofile OUT_FILENAME
                        Output filename