BUG: ser[:] = ["a", 1] casts 1 to "1"

[jbrockmendel]

ser = pd.Series(["a", 1])
ser[:] = list(ser.values))

>>> ser[1]
'1'

Looks like we call np.array(ser.values) and the cast happens in there.

[phofl]

This works now, may need tests

[arredond]

take