interesting gotcha

[Skaperen]

ok, i had forgotten the terminology.

BTW, r'\' did not behave as i expected ... try it

Output:
Python 3.5.2 (default, Nov 23 2017, 16:37:01)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> r'foo\\'
'foo\\\\'
>>> r'foo\'
  File "<stdin>", line 1
    r'foo\'
          ^
SyntaxError: EOL while scanning string literal
>>>

i think i see what the interpreter is doing.  it is doing a preliminary parse for the ending quote before it considers the raw indication, then maybe applies the escape sequence conversion on what it has collected.

Output:
>>> 'foo\'bar'
"foo'bar"
>>> r'foo\'bar'
"foo\\'bar"
>>>

this is that kind of behavior (quirks) that testing things reveals.  escaping the quote is still done even for raw strings.  but that is probably done in the source code parsing layer, anyway.

[wavic]

Hm! It's related to the single quote. This error appears when I forgot the closing quote. It looks like the raw string can't end in a single backslash. https://docs.python.org/3/reference/lexi...s-literals at the bottom of the subsection. I am learning a lot about you