Python implements ReadLine to remove special characters such as line break \ n

Just using Python's readline (s) to read the discovery of the file will always appear in the format of some small errors, and then think of it because the file newline characters and other symbols (\n\r\t) will also be readline (s) to read, the following is the small method I use

Give me a chestnut, here's my file:

In [1]: cat /tmp/ip.txt111.231.0.0/16122.152.0.0/16140.143.0.0/1659.110.0.0/16106.75.0.0/16

Read the file into the variable F, and then execute Redline Discovery, which also includes a newline character ' \ n ':

In [2]: f = open("/tmp/ip.txt",‘r‘)In [3]: f.readline()Out[3]: ‘111.231.0.0/16\n‘

We can cut the required content through the split method to get the following result, but it's not what we really want, and the result is a list:

In [4]: f.readline().split("\n")Out[4]: [‘122.152.0.0/16‘, ‘‘]

In the end, we can retrieve the previous content by index, and then send this content to other processes for processing.

In [5]: f.readline().split("\n")[0]Out[5]: ‘140.143.0.0/16‘

Perhaps some classmates will ask, that \r\t\n all exist situation?
Then we're going to just let them disappear.

Python implements ReadLine to remove special characters such as line break \ n