如何将多个txt文件合并成一个txt文件的内容？

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pythonimport os

for i in range(1, 19736): filename=f'./train_data/img_{i}.txt' if os.path.exists(filename): with open(filename, 'r') as read: with open('recode.txt', 'a') as writ: for line in read: writ.write(line + '\n')

import os
filename='./train_data/img_'
for i in range(1,19736):
newfile=filename+str(i)+'.txt'
if os.path.exists(newfile):
read= open(newfile, 'r')
for line in read:
writ = open('recode.txt', 'a')
writ.write(line)
writ.write('\n')
else:
continue