Python - OOPS Basics-eg1 - Day 25(4 days later)

simple program on bank account concept,based on oops

  
import datetime
import pytz
class Account:

    #this will be static method,ie it will be common for all instances(ie the class)
    #so while accessing it no need of using self
    @staticmethod
    def _current_time():
        utc_time = datetime.datetime.utcnow()
        return pytz.utc.localize(utc_time)



    def __init__(self,name,_balance):
        self._name =name
        self._transactiondetails_list = [(Account._current_time(), _balance)]
        self._balance = _balance
        print("Account Created for {}".format(self._name))
        self.showbalance()

    def deposit(self,amount):
        self._balance+=amount
        self.showbalance()
        self._transactiondetails_list.append((Account._current_time(), amount))
        # self.transactiondetails_list.append((pytz.utc.localize(datetime.datetime.utcnow()),amount))
        # print(self.transactiondetails_list)

    def withdraw(self,amount):
        if(0 < amount<=self._balance):
            self._balance-=amount
            self._transactiondetails_list.append((Account._current_time(), -amount))
        else:
            print("Amount should be greater than 0 and lesser than available balance")
        self.showbalance()

    def showbalance(self):
        print('Balance: ', self._balance)

    def showtransdetails(self):
        for date, amount in self._transactiondetails_list:
            if amount > 0:
                tran_type ='Deposited'
            else:
                tran_type ='Withdrwan'
                amount*=-1
            print("{:6} {} on {} (local time was {})".format(amount,tran_type,date,date.astimezone()))

udai = Account('udai',1000)
#udai.withdraw(100)
# udai.withdraw(200)
# udai.deposit(200)
# #we can update the balance variable to whatever we want outside of the class,so we can rename
# #to _balance,which will also dont restrict to change , but user can know that
# #it is for internal purpose and shouldn't be modified,similarly for the name and list variables
# #which should not be modified after the instantiation
# # udai.balance=0
# udai.showbalance()
# udai.showtransdetails()

#its better not to mess with '_' and '__' objects which will produce strange results
udai.showbalance()
udai._balance = 10
udai.showbalance()
print('*'*40)
print(udai.__dict__)
print(Account.__dict__)
udai.__balance = 49
udai.showbalance()
udai.showbalance()
print(udai.__dict__)
print(Account.__dict__)