Python：在列表中加入文件

Question

I am new to Python and am trying to join files that currently exist together in the same list into one file.

They share the same columns. What I have looks something like this:

File_A
ABC
1...
2...
3...

File_B
ABC
4...
5...
6...

And what I want to create is:

File_C
ABC
1...
2...
3...
4...
5...
6...

What I tried is this (in the list "files"):

import fileinput
with open(file_c,'w') as fout:
    for line in fileinput.input(file_a, file_b):
        fout.write(line); 

No dice. I end up with repeated lines for eternity.

I have tried other code as well to no avail. I know that I am doing something stupid, but I am not knowledgeable enough to know what that thing is.

Thanks.

Answer 1

Just iterate over each file object and write the lines to a new file:

with open("input1.txt") as f, open("input2.txt") as f2,open("output.txt","w") as f3:
    f2.next() # skip header to avoid writing  A B C twice
    for line in f:
        f3.write(line)
    f3.write("\n") # separate last line from file 1 and first of file 2
    for line in f2:
        f3.write(line)

Answer 2

Depending on how long running the process is, you could get away with

with open('output.txt', 'w') as out:
    out.writelines(open('file_a').readlines())
    out.writelines(open('file_b').readlines()[1:])