我的网站first.py:

def create_file(file_name):
list=["ab","cd","ef"]
for i in list:
    with open(file_name, "a+") as input_file:
        print(" {}".format(i), file = input_file)

我的网站second.py:

from first import create_file
def read_file(file_name):
# Create file with content
create_file(file_name)

# Now read file content
input_file = open(file_name, 'r')
for text_line in input_file:     
   for line in range(len(input_file)):
      if "cd" in text_line :
         word = (input_file[line + 1])
         print(word)

 read_file('ss.txt')

我找不到input_file的长度。
我不知道为什么。有人能帮帮我吗？
预期输出：
埃夫
然后如果行号= 2，我希望输出为"ef"。