df.to_dict(orient = "records") code example

Example 1: dataframe to dictionary

>>> df.to_dict('records')
[{'col1': 1, 'col2': 0.5}, {'col1': 2, 'col2': 0.75}]

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

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