def flatten(d):
    """Return a dict as a list of lists.

    >>> flatten({"a": "b"})
    [['a', 'b']]
    >>> flatten({"a": [1, 2, 3]})
    [['a', [1, 2, 3]]]
    >>> flatten({"a": {"b": "c"}})
    [['a', 'b', 'c']]
    >>> flatten({"a": {"b": {"c": "e"}}})
    [['a', 'b', 'c', 'e']]
    >>> flatten({"a": {"b": "c", "d": "e"}})
    [['a', 'b', 'c'], ['a', 'd', 'e']]
    >>> flatten({"a": {"b": "c", "d": "e"}, "b": {"c": "d"}})
    [['a', 'b', 'c'], ['a', 'd', 'e'], ['b', 'c', 'd']]

    """

    if not isinstance(d, dict):
        return [[d]]

    returned = []
    for key, value in d.items():
        # Each key, value is treated as a row.
        nested = flatten(value)
        for nest in nested:
            current_row = [key]
            current_row.extend(nest)
            returned.append(current_row)

    return returned
def flatten(d):
    """Return a dict as a list of lists.

    >>> flatten({"a": "b"})
    [['a', 'b']]
    >>> flatten({"a": [1, 2, 3]})
    [['a', [1, 2, 3]]]
    >>> flatten({"a": {"b": "c"}})
    [['a', 'b', 'c']]
    >>> flatten({"a": {"b": {"c": "e"}}})
    [['a', 'b', 'c', 'e']]
    >>> flatten({"a": {"b": "c", "d": "e"}})
    [['a', 'b', 'c'], ['a', 'd', 'e']]
    >>> flatten({"a": {"b": "c", "d": "e"}, "b": {"c": "d"}})
    [['a', 'b', 'c'], ['a', 'd', 'e'], ['b', 'c', 'd']]

    """

    if not isinstance(d, dict):
        return [[d]]

    returned = []
    for key, value in d.items():
        # Each key, value is treated as a row.
        nested = flatten(value)
        for nest in nested:
            current_row = [key]
            current_row.extend(nest)
            returned.append(current_row)

    return returned
def flatten ( d ) : if not isinstance ( d , dict ) : return [ [ d ] ] returned = [ ] for key , value in d . items ( ) : # Each key, value is treated as a row. nested = flatten ( value ) for nest in nested : current_row = [ key ] current_row . extend ( nest ) returned . append ( current_row ) return returned
Return a dict as a list of lists.

    >>> flatten({"a": "b"})
    [['a', 'b']]
    >>> flatten({"a": [1, 2, 3]})
    [['a', [1, 2, 3]]]
    >>> flatten({"a": {"b": "c"}})
    [['a', 'b', 'c']]
    >>> flatten({"a": {"b": {"c": "e"}}})
    [['a', 'b', 'c', 'e']]
    >>> flatten({"a": {"b": "c", "d": "e"}})
    [['a', 'b', 'c'], ['a', 'd', 'e']]
    >>> flatten({"a": {"b": "c", "d": "e"}, "b": {"c": "d"}})
    [['a', 'b', 'c'], ['a', 'd', 'e'], ['b', 'c', 'd']]
Return a dict as a list of lists .