add vs update in set operations in python

Question

What is the difference between add and update operations in python if i just want to add a single value to the set.

a = set()
a.update([1]) #works
a.add(1) #         


        

Answer 1

We use add() method to add single value to a set.

We use update() method to add sequence values to a set.

Here Sequences are any iterables including list,tuple,string,dict etc.