combine multiple text files into one text file using python

suppose we have many text files as follows:

file1:

abc
def
ghi

file2:

ABC
DEF
GHI

file3:

adfafa

file4:

ewrtwe
rewrt
wer
wrwe

How can we make one text file like below:

result:

abc
def
ghi
ABC
DEF
GHI
adfafa
ewrtwe
rewrt
wer
wrwe

Related code may be:

import csv
import glob
files = glob.glob('*.txt')
for file in files:
with open('result.txt', 'w') as result:
result.write(str(file)+'n')

After this? Any help?

Answers:

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Method 1

You can read the content of each file directly into the write method of the output file handle like this:

import glob

read_files = glob.glob("*.txt")

with open("result.txt", "wb") as outfile:
    for f in read_files:
        with open(f, "rb") as infile:
            outfile.write(infile.read())

Method 2

The fileinput module is designed perfectly for this use case.

import fileinput
import glob

file_list = glob.glob("*.txt")

with open('result.txt', 'w') as file:
    input_lines = fileinput.input(file_list)
    file.writelines(input_lines)

Method 3

You could try something like this:

import glob
files = glob.glob( '*.txt' )

with open( 'result.txt', 'w' ) as result:
    for file_ in files:
        for line in open( file_, 'r' ):
            result.write( line )

Should be straight forward to read.

Method 4

It is also possible to combine files by incorporating OS commands. Example:

import os
import subprocess
subprocess.call("cat *.csv > /path/outputs.csv")

Method 5

filenames = ['resultsone.txt', 'resultstwo.txt']
with open('resultsthree', 'w') as outfile:
    for fname in filenames:
        with open(fname) as infile:
            for line in infile:
                outfile.write(line)

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0