df = pd.DataFrame({'col1':[1, 2, 3], 'col2':[4, 5, 6]})
array_from_df = df.values

list_from_df = df.values.tolist()

dict_from_df = df.to_dict('list')

col_name = 'colname'
array1 = np.array([1, 2, 3])
array_df = pd.DataFrame(array1, columns=col_name)

col_name = ['colname1', 'colname2']
list1 = [[1, 2, 3], [4, 5, 6]]
list_df = pd.DataFrame(list1, columns=col_name)

dict = {'col1':[1, 2, 3], 'col2':[4, 5, 6], 'col3': [7, 8, 9]}
dict_df = pd.DataFrame(dict)