Juice Maker

Question

class Juice():
def __init__(self, name, capacity):
self.name = name
self.capacity = capacity

def __str__(self):
return (self.name + ' ('+str(self.capacity)+'L)')

def __add__(self,other):
return self.name+"&"+other.name+ '('+str(self.capacity+other.capacity)+'L'+")"

a = Juice('Orange', 1.5)
b = Juice('Apple', 2.0)
#b=Juice('Banana',3.5)
result = a + b
print(result)

my output : Orange&Apple(3.5L)
expected output: Orange&Apple (3.5L)
What is wrong with my code? I got the same expected result but it shows wrong answer.

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Another attempt :
class Juice:
def __init__(self, name, capacity):
self.name = name
self.capacity = capacity

def __str__(self):
return (self.name + ' ('+str(self.capacity)+'L)')

def __add__(self,other):
y=self.name+"&"+other.name
z='('+str(self.capacity+other.capacity)+'L'+")"
return y.__add__(z)

a = Juice('Orange', 1.5)
b = Juice('Apple', 2.0)
result = a + b
print(result)

Answer 1

class Juice:
def __init__(self, name, capacity):
self.name = name
self.capacity = capacity

def __str__(self):
return (self.name + ' ('+str(self.capacity)+'L)')

def __add__(self, other):
return Juice(self.name + '&' + other.name,self.capacity+other.capacity)

a = Juice('Orange', 1.5)
b = Juice('Apple', 2.0)

result = a + b
print(result)

Answer 2

I believe you should return a Juice object from __add__ magic method:

def __add__(self,other):
return new Juice(self.name+'&'+other.name,self.capacity+other.capacity);

however, you said your output is 'Orange&Apple(3.5L)' and expected is 'Orange&Apple (3.5L)'...
well, there's a missing space before parenthesis in the string returned by your __add__ function ^^

Answer 3

wow...
so, my first though was right: you are expected to just return a new Juice object from your __add__ method ;P

Answer 4

but you have put it in the __str__ method ;)

Answer 5

thank you so much, it was the space that I didn't notice

Answer 6

What do you mean by putting it in the __str__ method?

Answer 7

in your __str__ method, you do not have missed the space ;)

Answer 8

No, that was a practice problem in sololearn asking to define magic add function giving the expected result. I didn't write the __str__ or update it

Answer 9

class Juice:
def __init__(self, name, capacity):
self.name = name
self.capacity = capacity

def __str__(self):
return (self.name + ' ('+str(self.capacity)+'L)')

def __add__(self, other):
return Juice(self.name + '&' + other.name,self.capacity+other.capacity)

a = Juice('Orange', 1.5)
b = Juice('Apple', 2.0)

result = a + b
print(result)

Answer 10

I just added print statement and it accepted successfully (I did intentionally to check) and I am working on the problem to solve

Answer 11

class Juice:
def __init__(self, name, capacity):
self.name = name
self.capacity = capacity

def __str__(self):
return (self.name + ' ('+str(self.capacity)+'L)')

def __add__(self, other):

names = self.name + "&" + other.name
size = self.capacity + other.capacity
return "{} ({}L)".format(names, size)

a = Juice('Orange', 1.5)
b = Juice('Apple', 2.0)

result = a + b
print(result)

Answer 12

class Juice:
def __init__(self, name, capacity):
self.name = name
self.capacity = capacity

def __str__(self):
return self.name + " (" + str(self.capacity) + "L)"

def __add__(self, other):
Mix_name = "{}&{}".format(self.name, other.name)
Mix_capacity = self.capacity + other.capacity
return Juice(Mix_name, Mix_capacity).__str__()

a = Juice("Orange", 1.5)
b = Juice("Apple", 2.0)

result = a + b
print(result)