problem:
assigning a list of animals to the list variable overwrites the list function, so that later in line 531 the list function is not available and raises a Type Error:
```
In [133]: list(filled_dict.keys())
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-133-a2c520b90051> in <module>
----> 1 list(filled_dict.keys())
TypeError: 'list' object is not callable
```
solution:
use another variable name instead of list
A reminder to be aware of using mutable defaults.
Whether it is a real problem or not depends on exact use-case, but an update fully describing that and updating code with copying list, or defaulting with None and conditional initialization, would probably negatively affect readability of the example.
* [python3/en] show that True and False are ints
* [python3/en] rework some boolean stuff
I removed the example `-5 != False != True #=> True` because we didn't cover chaining yet.
A fix on static method section (around line 728).
Specifically, i.grunt() should raise an error since grunt() is a static method and 'i' is an instance of the class.
* updated docs on division for python3
prev. docs were confusing, did not show how to actually divide.
* modified language about python division
* fixed grammar
The previous version of this file had the original Dive Into Python, which was written with Python 2 in mind.
It has come to my attention that the author of the original has published an updated version designed for Python 3, so I added this version back in.
There were several resources here that teach Python 2, but not Python 3. I removed them so that a reader will only see resources that apply to Python 3.
* Add set and dict comprehensions for python 2 and 3
* Clean up formatting and generator explanation
* Include documentation for generator comprehensions
* Add __name__ check to make testing easier
* Update say to call print. Add more usage examples
* Move Modules section before Classes
Makes more sense for when explaining inheritance
* Add multiple inheritance example
* Add examples for multiple inheritance
* Add instance check examples
* Fix multiple inheritance example
* Add note on the __name__ variable
