Concatenate multiple files into a single file object without creating a new file

Question

This question is related to Python concatenate text files

I have a list of file_names, like [\'file1.txt\', \'file2.txt\', ...].

I wou

Answer 1

Using built-ins:

product=[]
for File in ['file1.txt','file2.txt','file3.txt']:
    for line in open(File,'r').readlines():
        product.append(line)

for line in product:print(line)

file.readlines() outputs the contents to a list and the file is closed.

You could also write:

product=[]
for File in ['file1.txt','file2.txt','file3.txt']:
    product+=open(File).readlines()

It's shorter and probably faster but I use the first because it reads better to me.

Cheers