find difference of values between 2 array of objects in python

Question

I have 2 array of objects:

a = [{\'a\': 1, \'b\': 2}, {\'c\': 3, \'d\': 4}, {\'e\': 5, \'f\': 6}]
b = [{\'a\': 1, \'b\': 2}, {\'g\': 3, \'h\': 4}, {\'f\': 6, \'e\