Typos and bugs

[albertvillanova]

There are plenty of typos and bugs in the code examples.

For example chapter03/right_way_use_abstract.py gives:

TypeError: object() takes no parameters

Another example, chapter03/using_dunter_for_inheritence.py gives:

TypeError: __init__() missing 2 required positional arguments: 'first_name' and 'last_name'

I really wonder how a book could get published containing so many and elementary bugs.

[VanDerMerwe]

There are some mistakes in the printed book:

Listing 1-6 uses the wrong way function of Listing 1-5

Page 13: good and bad examples are interchanged

Listing 1-15, 1-16, 1-18, ... oops, nearly all listings ...: "IndentationError: expected an indented block"

Page 36/37: [1 ,2 ,3 ,4 ,5 ,6 ,7 ,8 ,9 ,10] is not the same as range(10)

Listing 1-30: "IndentationError: expected an indented block" not only the docstring but the try block too

Listing 2-17: 'Belarus': 2 vs 'Belarus': 3

Listing 3-1 and others: regexp: the backslash before the period is superfluous. A period within a bracked expression has no special meaning.

Listing 3-15: "setFromatter"

Listing 3-19: the static method can not access cls
BTW: Such a long listing should be complete incl. all necessary imports IMHO

So far I read the book.

[VanDerMerwe]

Listing 3-25 and even Listing 3-26 make no sense. How can fruit.originated return "Central Asia"? Magic? How can the Fruit ctor handle a parameter without having a argument list? Both listings have a class Apple, which is not involved in any way.

It is not a pleasure to read a book, in which you expect such mistakes on each page.

That makes sense:

from abc import ABCMeta, abstractmethod

class Fruit(metaclass=ABCMeta):

    @abstractmethod
    def taste(self):
        pass

    @abstractmethod
    def originated(self):
        pass

class Apple(Fruit):
    def originated(self):
        return "Central Asia"

apple = Apple()  
# TypeError: Can't instantiate abstract class Apple with abstract methods taste