dataframe to dictionaty in pytnon code example

Example 1: python convert dictionary to pandas dataframe

>>> data = {'col_1': [3, 2, 1, 0], 'col_2': ['a', 'b', 'c', 'd']}
>>> pd.DataFrame.from_dict(data)
   col_1 col_2
0      3     a
1      2     b
2      1     c
3      0     d

Example 2: convert pandas dataframe to dict with a column as key

df.set_index('columnName').T.to_dict()