Question

In Python 3 the attempt to order a string and an int (e.g. 1 > "1") throws a TypeError.
Why does comparing a string with an int for equality not throw an error? (e.g. 1=="1")
What is an example where comparing a string with an int makes sense?
Why do JavaScript and SQL take a different approach?

Related:
How does Python compare string and int?

Answer 1

This allows you, for example, to have a dictionary with keys of mixed types.

If you couldn’t compare 1 and "1" for equality, you wouldn’t be able to use them as keys into the same dictionary.

As things stand, you can compare them, and they always compare unequal:

The objects need not have the same type. If both are numbers, they are converted to a common type. Otherwise, objects of different types always compare unequal, and are ordered consistently but arbitrarily.