Python-基于部分字符串打印行

Question

我有两个文件，我想相互检查，并取出它们所包含的行。

我试着用regex做这件事，但我一直收到这个错误，我认为这是因为我正在访问一个文件，而不仅仅是直接呈现一个字符串

File "C:Program FilesWindowsAppsPythonSoftwareFoundation.Python.3.9_3.9.2544.0_x64__qbz5n2kfra8p0libre.py", line 248, in finditer
return _compile(pattern, flags).finditer(string)
TypeError: expected string or bytes-like object

这就是我用于正则表达式搜索的内容

regex = r"d(.*(10.0.0.0).*)"
with open('test1.txt', 'r') as file1:
test = file1.read().splitlines()
matches = re.finditer(regex, test)
for matchNum, match in enumerate(matches, start=1):
print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group()))

我也尝试过，但仍然会出现错误

with open("test1.txt") as file1, open("test2") as file2:
st = set(map(str.rstrip,file1))
for line in file2:
spl = line.split(None, 1)[0]
if spl in st:
print(line.rstrip())

错误为

IndexError: list index out of range

我正在尝试将IP列表与路由器的输出进行匹配，因此test2文件看起来像这个

10.0.0.0/8
11.0.0.0/8
12.0.0.0/8
13.0.0.0/8

路由器输出看起来像

1 X test         10.0.0.0/8                          nov/19/2021 13:03:08
2 X test         11.0.0.0/8                          nov/19/2021 13:03:08
3 X test         12.0.0.0/8                          nov/19/2021 13:03:08
4 X test         13.0.0.0/8                          nov/19/2021 13:03:08

我希望路由器的整条线路只与IP匹配，而不是必须将整个预期输出

希望这已经足够了，对这一切来说仍然很新鲜，欢呼

Answer 1

完整答案为

with open("router_output.txt") as file1, open("list_of_ips.txt") as file2:
ips_to_keep = file2.read().splitlines()
router_lines = file1.read().splitlines()
ips_to_keep = [" " + ip + " " for ip in ips_to_keep]
for line in router_lines:
if any(ip in line for ip in ips_to_keep):
print(line)

假设您的文件有空格而没有制表符：(

Answer 2

如果您有一个包含实际IP的文件，并且不需要正则表达式，那么您可以执行类似的操作

my_str = """
1 X test         10.0.0.0/8                          nov/19/2021 13:03:08
2 X test         11.0.0.0/9                          nov/19/2021 13:03:08
3 X test         12.0.0.0/12                          nov/19/2021 13:03:08
4 X test         13.0.0.0/2                          nov/19/2021 13:03:08
5 X test         555.0.0.0/2                          nov/19/2021 13:03:08 #expecting this to not be printed
"""
keep_ips = [' 10.0.0.0/8 ', ' 11.0.0.0/9 ', ' 12.0.0.0/12 ', ' 13.0.0.0/2 ']

for line in my_str.split('n'):
if any(ip in line for ip in keep_ips):
print(line)

我在keep_ips中添加了空格填充，因为否则你可以在类似113.0.0.0/25的东西上匹配，因为它包含子字符串13.0.0.0/2

您可以重构此代码以读取路由器的行，然后读取IP的行，在IP的任一端添加空格，然后使用any使用此逻辑

我希望这对你现在有效