assertEquals vs. assertEqual in python

Question

Is there a difference between assertEquals and assertEqual in the python unittest.TestCase?

And if there is not, why are there

Answer 1

A 3.3 update: From 26.3.7.1.1. Deprecated aliases :

For historical reasons, some of the TestCase methods had one or more aliases that are now deprecated. The following table lists the correct names along with their deprecated aliases:

Method Name   | Deprecated alias | Deprecated alias
--------------+------------------+-----------------
assertEqual() | failUnlessEqual  | assertEquals
...