在Python中，打印字符串时是否可以转义换行符？

Question

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?

Answer 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

Answer 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

Answer 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.