On: Running your JS code in Python

[edward]

You don't need to escape slashes if you use a regexp string like this: r'no need to escape slash\n'.

[swinglock → edward]

It's called a "raw string" rather than "regexp string", though that is the common use for it.

[bobbyi_settv → swinglock]

The other common use is Windows paths since traditionally backslashes are used as the delimiter. (Obviously hardcoded paths in code aren't generally a great idea, but that's another story.)

[sheetjs → edward]

Very cool! In this case, since the injected text will end in a newline, that approach will work (and it appears to work with r"""triple-quoted\'s"""

But I do see syntax errors if the bare slash is at the end:

    >>> r'slash at end\'
      File "<stdin>", line 1
        r'slash at end\'
                   ^
    SyntaxError: EOL while scanning string literal

[cstejerean → sheetjs]

Yeah, that's about the only restriction. From the docs:

Specifically, a raw string cannot end in a single backslash (since the backslash would escape the following quote character).