I have created a class and created 3 different objects from it. But when I do a change in one of them, other objects get affected too.
I'm running python on pycharm
class Teller():
def __init__(self,queue=[]):
self.queue = queue
teller1 = Teller()
teller2 = Teller()
teller1.queue.append(5)
print(teller1.queue)
print(teller2.queue)
I expected the results as [5] and [0]
but instead, I get [5] and [5]
When you provide default arguments, it uses the same object every time. So when teller2 is initialized with a default list, it is the same list that teller1 got.
A better way to initialize this would be:
class Teller():
def __init__(self,queue=None):
self.queue = queue if queue else list()
Ths is because both your objects point to the same class tat's initialising the same queue. What I guess you could do is create different classes or call different functions.
Different Functions
class Teller():
def __init__(self,queue=[]):
self.queue = queue
def queue2 (self, queue1=[]):
self.queue1 = queue1
teller1 = Teller()
teller2 = Teller()
teller1.queue.append(5)
print(teller1.queue)
print(teller2.queue2())
Different Classes
class Teller():
def __init__(self,queue=[]):
self.queue = queue
class Teller2():
def __init__(self, queue = []):
self.queue = queue
teller1 = Teller()
teller2 = Teller2()
teller1.queue.append(5)
print(teller1.queue)
print(teller2.queue)
