comparing strings in Python using or is [closed]

Question

In the following Python code:

>>> s1 = 'Hello'
>>> s2 = 'Hello'
>>> s2 is s1
True

If I compare Var1 is Var2 in a conditional statement if fails to give the correct answer but if i write Var1 == Var2 instead, it returns true. Why is that happening?

Answer 1

is is used for identity testing and == is used for equality testing, i.e, is is the id(a) == id(b).

So your code will be emaluated in the following way:

>>> a = 'hi'
>>> b = ''.join(['h', 'i'])
>>> a == b
True
>>> a is b
False