Python 使用另一个文件的输入在文件中搜索文本

我是 python 和编程新手。我需要一些关于 python 脚本的帮助。有两个文件，每个文件包含电子邮件地址（超过 5000 行）。输入文件包含我要在数据文件中搜索的电子邮件地址（还包含电子邮件地址）。然后我想将输出打印到文件或显示在控制台上。我搜索脚本并能够进行修改，但没有得到所需的结果。你能帮我么？

dfile1 (50K lines)
[email protected]
[email protected]
[email protected]


ifile1 (10K lines)
[email protected]
[email protected]
[email protected]
[email protected]

Output file
[email protected]
[email protected]



datafile = 'C:\\Python27\\scripts\\dfile1.txt'
inputfile = 'C:\\Python27\\scripts\\ifile1.txt'

with open(inputfile, 'r') as f:
names = f.readlines()

outputlist = []

with open(datafile, 'r') as fd:
  for line in fd:
    name = fd.readline()
    if name[1:-1] in names:
        outputlist.append(line)
    else:
        print "Nothing found"
 print outputlist

新守则

with open(inputfile, 'r') as f:
    names = f.readlines()
outputlist = []

with open(datafile, 'r') as f:
    for line in f:
        name = f.readlines()
        if name in names:
            outputlist.append(line)
        else:
            print "Nothing found"
    print outputlist

也许我错过了一些东西，但为什么不使用一对呢？

#!/usr/local/cpython-3.3/bin/python

data_filename = 'dfile1.txt'
input_filename = 'ifile1.txt'

with open(input_filename, 'r') as input_file:
    input_addresses = set(email_address.rstrip() for email_address in input_file.readlines())

with open(data_filename, 'r') as data_file:
    data_addresses = set(email_address.rstrip() for email_address in data_file.readlines())

print(input_addresses.intersection(data_addresses))