dataframe to dictionary with one column as key code example

Example 1: dictionary from two columns pandas

pd.Series(df.A.values,index=df.B).to_dict()

Example 2: dataframe to dictionary with one column as key

pd.Series(df.A.values,index=df.B).to_dict()

Example 3: convert pandas group to dict

res = dict(tuple(d.groupby('a')))