BUG: iloc setitem indexing with list of lists #7551
Description
different results when mixed vs single dtypes
In [1]: df = DataFrame(dict(A = np.arange(5), B = np.arange(5,10))) In [2]: df Out[2]: A B 0 0 5 1 1 6 2 2 7 3 3 8 4 4 9 In [4]: df.iloc[2:4] = [[10,11],[12,13]] In [5]: df Out[5]: A B 0 0 5 1 1 6 2 10 11 3 12 13 4 4 9 In [6]: df = DataFrame(dict(A = list('abcde'), B = np.arange(5,10))) In [7]: df.iloc[2:4] = [['x',11],['y',13]] In [8]: df Out[8]: A B 0 a 5 1 b 6 2 x y 3 11 13 4 e 9