Why doesn't 2.__add__(3) work in Python?

Question

The integer 2 has an __add__ method:

>>> \"__add__\" in dir(2)
True

... but calling it raises a SyntaxEr

Answer 1

2. is parsed as a float, so 2.__add__ is a SyntaxError.

You can evaluate

(2).__add__(3) instead.

---

In [254]: (2).__add__(3)
Out[254]: 5

Answer 2

Another way to get around 2. being parsed as a float is to insert a space between the 2 and the .

>>> 2 .__add__(3)
5