interesting gotcha

[wavic]

This is not comment string but doc string.

def func()
    """ This is a valid documentation string.
        It's called documentation string not a comment.
        It's not ignored by the Python interpreter.
        It's become a part of the object.
    """
    pass

As you know func.__doc__ contains this doc string. And beeng a string it is evaluated. I prefer to escape the backslash but perhaps depends on the case.

PEP 257:

For consistency, always use """triple double quotes""" around docstrings. Use r"""raw triple double quotes""" if you use any backslashes in your docstrings. For Unicode docstrings, use u"""Unicode triple-quoted strings""".