python: instance has no __call__ method

[KADRI]

Hello friends,
I recently started learning Python. I have written following code in Python. I the following code I have use 2 classes to define a few arrays of objects, which are used to store some unique strings and integers. The objects will consist of the following:

object[k].user
         .a     # a = k
         .names
         .coordss
         .heros

After that I have written rest of the code. When I run this code I get following error message.
AttributeError: CityBean instance has no __call__ method. I don't know what is that mean. pleas helm me to fix this problem.

[absolute55]

From your information it is very difficult to understand what you want from your code. I think you have written wrong code and that's why you are getting such type of problem. In this case you have to write following code to fix this problem.

data = {
        (1, 'users1'): ("names1", "coords1", "heros1"),
        (2, 'users1'): ("names2", "coords2", "heros2"),
        #...
        (1, 'users2'): ("names11", "coords11", "heros11"),
        (2, 'users2'): ("names12", "coords12", "heros12"),
        # ...
    }


class CityBean:
    def __init__(self,names,coordss,heros):
        self.names = names
        self.coordss = coordss
        self.heros = heros

class Castles:
    def __init__(self,users,n):
        self.users = users
        self.n = n
        names, coordss, heros = data.get((n, users))
        self.citybean = CityBean(names, coordss, heros)

[Reegan]

You have written wrong code and that's why you are getting such type of problem. Why did your write following code?

temps = {
            CityBeans( "names21" , "coords21" , "heros21" ),
            
            CityBeans( "name30s" , "coord30s" , "heros30" ) }[self.n]()

Have you think temp= {...}[something]() will do? If yes, then you are wrong. It only creates dictionary. You also have wrongly called CityBean object. This is function. You have create dictionaries only to pick a single item of it which is wrong.

[opaper]

You have put parenthesis after a class name and that's why you are getting such type of problem. When you put parenthesis after a class name, expression instantiates it immediately. If you are want to delay instantiation, then in this case you have to use lambda or functools.partial() to fix this problem. You can do this like:

 lambda: CitysBeans("", "", "")}...

[MindSpace]

I think you have written wrong code and that's why you are getting such type of problem. You have written following code:

 CityBean( "names1"  , "coords1" , "heros1"),
CityBean( "names10" , "coords10" , "heros10" )}[self.n]()

In the above code you are tried to take value from dictionary. Values on your dictionary are CityBeans instances. In this case you have to write following:

CitysBeans( "names1"  , "coords1" , "heros1")()

You also have to add a __call__ method depending on the need.

[Modifier]

Look at your code in python:

CityBean( "names1"  , "coords1" , "heros1")

When you write above code, you initialize the object CityBean. In above code there is no need for an extra (). You have also write make k\mistake in following code:

CityBean( "names10" , "coords10" , "heros10" )}[self.n]()

In above code you are tried to call something which is not possible.