Why is my list behaving like a static variable? [duplicate]

Question

I made an example python script to show a simplified version of an issue I discovered in my other program. Why is list behaving like a static variable? How can I fix this? Any help would be greatly appreciated. Thanks!

Code:

class MyClass:
    id = 0
    list = []

    def addToList(self,value):
        self.list.append(value)

    def printClass(self):
        print("\nPrinting Class:")
        print("id: ", self.id)
        print("list: ", self.list)


classes = []

# create 4 classes, each with a list containing 1 string
for i in range(0,4):
    myClass = MyClass() # create new EMPTY class
    myClass.id = i # assign id to new class
    myClass.addToList("hello") # add a string to its list
    classes.append(myClass) # save that class in a list

for myClass in classes:
    myClass.printClass()

Output:

Printing Class:
id:  0
list:  ['hello', 'hello', 'hello', 'hello']

Printing Class:
id:  1
list:  ['hello', 'hello', 'hello', 'hello']

Printing Class:
id:  2
list:  ['hello', 'hello', 'hello', 'hello']

Printing Class:
id:  3
list:  ['hello', 'hello', 'hello', 'hello']