gistfile1.pyw

def mark_safe(s):
    """
    Explicitly mark a string as safe for (HTML) output purposes. The returned
    object can be used everywhere a string or unicode object is appropriate.

    Can be called multiple times on a single string.
    """
    if isinstance(s, SafeData):
        return s
    if isinstance(s, str) or (isinstance(s, Promise) and s._delegate_str):
        return SafeString(s)
    if isinstance(s, (unicode, Promise)):
        return SafeUnicode(s)
    return SafeString(str(s))