Method warn

IPython/core/display.py:433–443

()

    def __init__(self, data=None, url=None, filename=None, metadata=None):
        def warn():
            if not data:
                return False

            #
            # Avoid calling lower() on the entire data, because it could be a
            # long string and we're only interested in its beginning and end.
            #
            prefix = data[:10].lower()
            suffix = data[-10:].lower()
            return prefix.startswith("<iframe ") and suffix.endswith("</iframe>")

        if warn():
            warnings.warn("Consider using IPython.display.IFrame instead")