Getting rid of \n when using .readlines()
This question already has an answer here:
这应该做你想做的（列表中的文件内容，按行，没有 n）
with open(filename) as f:
mylist = f.read().splitlines()
I'd do this:
alist = [line.rstrip() for line in open('filename.txt')]
or:
with open('filename.txt') as f:
alist = [line.rstrip() for line in f]
You can use .rstrip('n') to only remove newlines from the end of the string:
for i in contents:
alist.append(i.rstrip('n'))
This leaves all other whitespace intact. If you don't care about whitespace at the start and end of your lines, then the big heavy hammer is called .strip() .
However, since you are reading from a file and are pulling everything into memory anyway, better to use the str.splitlines() method; this splits one string on line separators and returns a list of lines without those separators; use this on the file.read() result and don't use file.readlines() at all:
alist = t.read().splitlines()
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