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+--- Thread: function not giving back total (/thread-29263.html)
function not giving back total - SephMon - Aug-25-2020
Hello there
New to python, I have a background in java, I'm finding oop in python confusing, this program simply prints out employee info and its suppose calculate their wage, when I run the program it just displays 0, any help appreciated thanks.
class Pay():
def __init__(self, name, age, hoursWorked, amount_per_hour, total):
self.name(name)
self.age(age)
self.hoursWorked(hoursWorked)
self.amount_per_hour = amount_per_hour
self.total = total
def name(self):
return self.__name
def name(self, newname):
if not newname:
raise Exception("NAME FIELD CANNOT BE EMPTY")
self.__name = newname
def age(self):
return self.__age
def age(self, newvalue):
if newvalue < 18:
raise Exception("INVALID AGE")
self.__age = newvalue
def hoursWorked(self):
return self.__hoursWorked
def hoursWorked(self, newhours):
if newhours < 0:
raise Exception("HOURS MUST BE ENTERED")
self.__hoursWorked = newhours
def amount_per_hour(self):
return self.__amount_per_hour
def amount_per_hour(self, newamount):
self.__amount_per_hour = newamount
def total(self):
return self.__total
def total(self, newtotal):
self.__total = newtotal
def calculate_wage(self):
self.total = self.hoursWorked * self.amount_per_hour
return self.total
def __str__(self):
return "Name: " + self.__name + "\nAge: " + str(self.__age) + "\nHourWorked: " + str(
self.__hoursWorked) + "\nAmount per Hour: " + str(self.amount_per_hour) + "\nTotal: " + str(self.total)
p = Pay("Kevin", 34, 40, 9.80, 0)
print(p)The outputQuote:Name: Kevin
Age: 34
HourWorked: 40
Amount per Hour: 9.8
Total: 0
Total field is 0 but I want it to display total wage.
RE: function not giving back total - deanhystad - Aug-25-2020
Python does not support polymorphism based on the signature. Each time you you use the same name for a method it replaces the previous method declaration.
def total(self): # This method is thrown away because of the method below.
return self.__total
def total(self, newtotal): # This method replaces the total method defined above
self.__total = newtotalI think you want to use properties.https://docs.python.org/3.8/library/functions.html#property
The total field is 0 because you initialize total to zero and never change it. I would not make total a variable in class because it can be calculated from hours and hourly wage. If you want to have a total in Pay you'll have to compute total each time hours or pay rate is changed.