对象列表不可迭代，并且调用变量在其他函数中

Question

I have seen this post but still can not figure out my problem. Python iteration of list of objects "not iterable" My question also has a second part which is: How can I use variable which was created in one function in other. I will start with it. Answers that I googled or fined in SO:

1 variant - globals

def func1():
    global value2,value1
    value1 = 1
    value2 = 2
def func2():
    global value2,value1
    do smth with value1 
    do smth with value2

func1()
func2()

But this is bad idea, due to some reason. I do not get still too much, like I am using same namespaces, and limit variants of naming variables. And some unpredictable behavior is much easier to get..(that is what I understood)

2 variant -functions are objects, and everything in Python is an object!

def func1():
    func1.value1 = 1
    func1.value2 = 2
def func2():
    do smth with func1.value1
    do smth with func1.value2

func1()
func2()

This is a better idea?

3 variant - use return

I know that everybody says : try to make your function to return some value which you will use further. But! I have a function draw() which is rerunning 60 times per second, that is why writing like this is a mess:

def draw():
    variable = some_function()

My function will be starting 60times per second, where I need just 1 time till specific trigger/button is pressed.

Finally my main question Here is my code:

class Card:
    def __init__(self, suit, rank):
        ...
    def draw(self, canvas, pos):
        ...
class Hand:
    def __init__(self):
        self.hand_list = []
    def draw(self, canvas, pos):
        ...
    deff add_card(self)

def deal():
    test_hand = Deck() # from the Deck we fulfill cards to player and computer hands
    test_hand.shuffle()
    deal.player_hand, computer_hand = Hand(), Hand()

def draw(canvas):
    i = 0
    for card in deal.player_hand:
        deal.player_hand.draw(canvas, [300, 300])

And finnaly I get.

TypeError: 'Hand' object is not iterable

Somewhere type of self.hand_list changed from list to a non list. Or a problem is somewhere deeper. Because when I look at what interpreter is printing - he is printing 2 Cards of some suit and rank as 1 object. I do not know where to start from. I would be really helpful for advices.

I have got Learning Python by Mark Lutz, maybe there are some topics should look deeper at?

Thanks everybody!

Here is the link to my code. You can run it from there. http://www.codeskulptor.org/#user35_zXdT3D8RpqJXoVb.py

Answer 1

Your problem is in the draw method:

for card in deal.player_hand:
    ...

You're iterating over player_hand , which is an object of the Hand class, and not the cards within that hand. You probably want to do for card in deal.player_hand.hand_list .