python - concatenate several file remove header lines -

what'd way concatenate several files, removing header lines (number of header lines not known in advance), , keeping first file header line header in new concatenated file?

i'd in python, awk or other languages work long can use subprocess call unix command.

note: header lines start #.

something using python:

files = ["file1","file2","file3"]  open("output_file","w") outfile:     open(files[0]) f1:         line in f1:        #keep header file1             outfile.write(line)      x in files[1:]:         open(x) f1:             line in f1:                 if not line.startswith("#"):                     outfile.write(line) 

you can use fileinput module here:

this module implements helper class , functions write loop on standard input or list of files.

import fileinput header_over = false open("out_file","w") outfile:     line in fileinput.input():         if line.startswith("#") , not header_over:             outfile.write(line)         elif not line.startswith("#"):             outfile.write(line)             header_over = true 

usage :$ python so.py file1 file2 file3

input:

file1:

#header file1 foo bar 

file2:

#header file2 spam eggs 

file3:

#header file3 python file 

output:

#header file1 foo bar  spam eggs  python file