如何基于Python按行合并两个txt

file1 = open(\"my.txt\",\"r\")
file2 = open(\"ids.txt\",\"r\")
 
file1_lists =file1.readlines()
file2_lists =file2.readlines()
 
file3_list = []
file4_list = []
for i in file1_lists:
  temp_list = i.split()
  file3_list.append(str(temp_list[0]))
# print(len(file3_list))
 
for i in file2_lists:
  temp_list = i.split()
  file4_list.append(str(temp_list[0]))
# print(len(file4_list))
main_file = []
 
for i in range(len(file3_list)):
  s=\"\"
  s = \"\".join([file3_list[i],file4_list[i]])
  s+=\"\\n\"
  main_file.append(s)
file3 = open(\"three.txt\",\"w\")
file3.writelines(main_file)