csv - Loop over files in a directory and merge them python -

i have 2 files in folder called looper:

testfile.csv  file2.csv 

i want python code loop on each file in folder , merge them single output file. far, code follows:

def combine_csv_files(input_folder_path, output_path):     fout = open(output_path, "a")     file in sorted(os.listdir(input_folder_path)):         line in open(file):             fout.write(line) 

with getting error:

ioerror: [errno 2] no such file or directory: 'file2.csv' 

i don't understand why. also, when merge these files, want column headers first file. want merge remaining files form second row. please help!

os.listdir() returns file names, full path, use os.path.join():

full_path = os.path.join(input_folder_path, file) line in open(full_path):     fout.write(line) 

as follow-up question skipping first line, simplest way use itertools.islice:

from itertools import islice     line in islice(open(full_path), 1, none):     fout.write(line)