Python global variable and class functionality

Question

Im creating a simple python program that gives basic functionality of an SMS_Inbox. I have created an SMS_Inbox method.

store = []
message_count = 0
class sm         


        

Answer 1

That's not how classes work. Data should be stored within the class instance, not globally.

class SMSStore(object):
    def __init__(self):
        self.store = []
        self.message_count = 0

    def add_new_arrival(self,number,time,text):
        self.store.append(("From: "+number, "Recieved: "+time,"Msg: "+text))
        self.message_count += 1

    def delete(self, i):
        if i >= len(store):
            raise IndexError
        else:
            del self.store[i]
            self.message_count -= 1

sms_store = SMSStore()
sms_store.add_new_arrival("1234", "now", "lorem ipsum")
try:
    sms_store.delete(20)
except IndexError:
    print("Index does not exist")

print sms_store.store

# multiple separate stores
sms_store2 = SMSStore()
sms_store2.add_new_arrival("4321", "then", "lorem ipsum")
print sms_store2.store