Polymorphism?

gistfile1.py

In [1]: 1 + 1
Out[1]: 2

In [2]: 1 + 1.0
Out[2]: 2.0

In [3]: 1 + "string"
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-3-d295ea69933a> in <module>()
----> 1 1 + "string"

TypeError: unsupported operand type(s) for +: 'int' and 'str'

In [4]: 1 + True
Out[4]: 2

In [5]: 1 + None
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-5-3545813ae2b1> in <module>()
----> 1 1 + None

TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'

In [6]: True + False
Out[6]: 1

In [7]: True + None
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-7-6f28c7b268c5> in <module>()
----> 1 True + None

TypeError: unsupported operand type(s) for +: 'bool' and 'NoneType'

In [8]: True + "string"
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-8-2e981efb30c0> in <module>()
----> 1 True + "string"

TypeError: unsupported operand type(s) for +: 'bool' and 'str'

In [9]: "string" + "string"
Out[9]: 'stringstring'

In [10]: "string" + None
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-10-31b8af0d9e55> in <module>()
----> 1 "string" + None

TypeError: cannot concatenate 'str' and 'NoneType' objects

In [11]: 1.0 + True
Out[11]: 2.0

gistfile2.py

In [1]: True = None

In [2]: False = None

In [3]: True is False
Out[3]: True