[SOLVED] No output in classes

Question

Hi,
The code isn't showing any output. Can someone tell me the reason-

#!/usr/bin/python
# python program for items and its two child classes perishable and non perishable
class Items(object):
def __init__(self,price):
self.price = price

def CalculateSalePrice(self):
pass

class Perishable(Items):
def __init__(self,price):
self.price = price

def CalculateSalePrice(price):
print('The price is:',(price+500))

class NonPerishable(Items):
def __init__(self,price):
self.price = price

def CalculateSalePrice(price):
print('The price is:',(price+(price * 0.1)))

i = Items(10)
i.CalculateSalePrice()
i.CalculateSalePrice()

Thanks

Answer 1

class Perishable(Items):
def __init__(self,price):
self.price = price

def CalculateSalePrice(self):
print('The price is:',(self.price+500))

class NonPerishable(Items):
def __init__(self,price):
self.price = price

def CalculateSalePrice():
print('The price is:',(self.price+(self.price * 0.1)))

Answer 2

Gopal Gautam , not working 😐

「ＨＡＰＰＹ ＴＯ ＨＥＬＰ」 don't know how to do it.

Answer 3

Sachin you're creating object of base class "items" which have "CalculateSalePrice" method that does nothing (pass). You need to either print something from this base class's "CalculateSalePrice" method or need to create object of either "Perishable" or "NonPerishable"

i = Perishable(10) #Or NonPerishable(10)
i.CalculateSalePrice()

Answer 4

didn't work 「ＨＡＰＰＹ ＴＯ ＨＥＬＰ」

Answer 5

Sachin Artani The reason its simple: Your call the CalculateSalePrice on an object that define it like with empy body (Item class)... Futhermore you dont use well inheritance... In your context you havnt to define the constructors in derived clasees (Perishabe and NonPerishable) or call super in they (that set price attr) like:

class Perishable(Items):
def __init__(price):
super().__init__(price)

Answer 6

Sachin Artani You are welcome 👍👍👍

Answer 7

#No output in classes
#Hi,
#The code isn't showing any output. Can someone tell me the reason-
#!/usr/bin/python
# python program for items and its two child classes perishable and non perishable
class Items(object):
def __init__(self,price):
self.price = price
def CalculateSalePrice(self):
#pass
#Just a test
p = Perishable(self)
p.CalculateSalePrice()
nP = NonPerishable(self)
nP.CalculateSalePrice()
class Perishable(Items):
def __init__(self,item):
self.price = item.price
def CalculateSalePrice(self):
print('The price is:',(self.price+500))
class NonPerishable(Items):
def __init__(self,item):
self.price = item.price
def CalculateSalePrice(self):
print('The price is:',(self.price * (self.price * 0.2)))
i = Items(10.0)
i.CalculateSalePrice()
#I have fixed it so. I am not sure if you wanted like this.

Answer 8

Thank you guys 😊

Answer 9

Thanks KrOW for the kind help.