from itertools import chain
pd.DataFrame(list(chain.from_iterable(
(((k, v) for v in vals) for (k, vals) in dct.items()))),
columns=('Column1', 'Column2')))
from itertools import chain
pd.DataFrame(list(chain.from_iterable(
(((k, v) for v in vals) for (k, vals) in dct.items()))),
columns=('Column1', 'Column2')))
from itertools import chain
pd.DataFrame(list(chain.from_iterable(
((k, v) for v in vals) for (k, vals) in dct.items())),
columns=('Column1', 'Column2'))
from itertools import chain
pd.DataFrame(list(chain.from_iterable(
(((k, v) for v in vals) for (k, vals) in dct.items()))),
columns=('Column1', 'Column2')))