Join two lists on id python

Example 1: join two dictionaries python

z = {**x, **y}

Example 2: merge two list of dictionaries python with string

import pandas as pd l1 = [{'id': 9, 'av': 4}, {'id': 10, 'av': 0}, {'id': 8, 'av': 0}] l2 = [{'id': 9, 'nv': 45}, {'id': 10, 'nv': 0}, {'id': 8, 'nv': 30}] df1 = pd.DataFrame(l1).set_index('id') df2 = pd.DataFrame(l2).set_index('id') df = df1.merge(df2, left_index=True, right_index=True) df.T.to_dict() # {9: {'av': 4, 'nv': 45}, 10: {'av': 0, 'nv': 0}, 8: {'av': 0, 'nv': 30}}