问题
I found the sequence \newline in a list of escape sequences in the python documentation. I wonder how it is used and for what. At least in my interpreter it seems this is just interpreted as '\n' + 'ewline':
>>> print('\newline')
ewline
回答1:
It refers to the actual newline character - the one with character code "16" (0x10) - not the text sequence "newline".
So, an example is like:
print("a\
b")
Here, the backslash is succeeded by the newline, inside a string, and what is printed is just "ab" with nothing apart.
it differs from \n - in here, the characer following the backslash is n (0x6e), and this sequence is translated to \x10 on parsing the string. On \<newline>, the source string contains the \x10 character and that is replaced by an empty string.
Maybe the documentation on that page would be more clear if it would read \<newline> instead of just \newline.
回答2:
The documentation you are alluding to is explaining how a backslash followed by a literal newline is ignored, as if the next line were physically joined with the line on which the starting backslash was found.
The string \newline' has no special meaning; it is exactly what you say you think it is.
来源：https://stackoverflow.com/questions/48693600/what-does-the-newline-escape-sequence-mean-in-python