Concatenating Files And Insert New Line In Between Files

Question

I have multiple files which I want to concat with cat. Let\'s say

File1.txt 
foo

File2.txt
bar

File3.txt
qux

I want to conc

Answer 1

In python, this concatenates with blank lines between files (the , suppresses adding an extra trailing blank line):

print '\n'.join(open(f).read() for f in filenames),

Here is the ugly python one-liner that can be called from the shell and prints the output to a file:

python -c "from sys import argv; print '\n'.join(open(f).read() for f in argv[1:])," File*.txt > finalfile.txt