問題描述
Trong Python, có thể thoát các ký tự dòng mới khi in một chuỗi không? (In Python, is it possible to escape newline characters when printing a string?)
I want the newline \n to show up explicitly when printing a string retrieved from elsewhere. So if the string is 'abc\ndef' I don't want this to happen:
>>> print(line)
abc
def
but instead this:
>>> print(line)
abc\ndef
Is there a way to modify print, or modify the argument, or maybe another function entirely, to accomplish this?
參考解法
方法 1:
Just encode it with the 'string_escape' codec.
>>> print "foo\nbar".encode('string_escape')
foo\nbar
In python3, 'string_escape' has become unicode_escape. Additionally, we need to be a little more careful about bytes/unicode so it involves a decoding after the encoding:
>>> print("foo\nbar".encode("unicode_escape").decode("utf‑8"))
unicode_escape reference
方法 2:
Another way that you can stop python using escape characters is to use a raw string like this:
>>> print(r"abc\ndef")
abc\ndef
or
>>> string = "abc\ndef"
>>> print (repr(string))
>>> 'abc\ndef'
the only proplem with using repr() is that it puts your string in single quotes, it can be handy if you want to use a quote
方法 3:
Simplest method: str_object.replace("\n", "\\n")
The other methods are better if you want to show all escape characters, but if all you care about is newlines, just use a direct replace.
(by Tyler、mgilson、PurityLake、ACEfanatic02)