environment/lib/python2.7/site-packages/IPython/core/inputsplitter.py
def last_two_blanks(src):
    """Determine if the input source ends in two blanks.

    A blank is either a newline or a line consisting of whitespace.

    Parameters
    ----------
    src : string
      A single or multiline string.
    """
    if not src: return False
    # The logic here is tricky: I couldn't get a regexp to work and pass all
    # the tests, so I took a different approach: split the source by lines,
    # grab the last two and prepend '###\n' as a stand-in for whatever was in
    # the body before the last two lines.  Then, with that structure, it's
    # possible to analyze with two regexps.  Not the most elegant solution, but
    # it works.  If anyone tries to change this logic, make sure to validate
    # the whole test suite first!
    new_src = '\n'.join(['###\n'] + src.splitlines()[-2:])
    return (bool(last_two_blanks_re.match(new_src)) or
            bool(last_two_blanks_re2.match(new_src)) )
def last_two_blanks(src):
    """Determine if the input source ends in two blanks.

    A blank is either a newline or a line consisting of whitespace.

    Parameters
    ----------
    src : string
      A single or multiline string.
    """
    if not src: return False
    # The logic here is tricky: I couldn't get a regexp to work and pass all
    # the tests, so I took a different approach: split the source by lines,
    # grab the last two and prepend '###\n' as a stand-in for whatever was in
    # the body before the last two lines.  Then, with that structure, it's
    # possible to analyze with two regexps.  Not the most elegant solution, but
    # it works.  If anyone tries to change this logic, make sure to validate
    # the whole test suite first!
    new_src = '\n'.join(['###\n'] + src.splitlines()[-2:])
    return (bool(last_two_blanks_re.match(new_src)) or
            bool(last_two_blanks_re2.match(new_src)) )
Determine if the input source ends in two blanks.

    A blank is either a newline or a line consisting of whitespace.

    Parameters
    ----------
    src : string
      A single or multiline string.