I am working on a program that needs a str method. However, when I run the code, it only outputs:
What is the name of the pet: Tim
What type of pet is it: Turtle
How old is your pet: 6
How can I print out what I need from the str method?
Here is what I have.
This is the code for my class (classPet.py)
class Pet:
def __init__(self, name, animal_type, age):
self.__name = name
self.__animal_type = animal_type
self.__age = age
def set_name(self, name):
self.__name = name
def set_type(self, animal_type):
self.__animal_type = animal_type
def set_age(self, age):
self.__age = age
def get_name(self):
return self.__name
def get_animal_type(self):
return self.__animal_type
def get_age(self):
return self.__age
def __str__(self):
return 'Pet Name:', self.__name +\
'\nAnimal Type:', self.__animal_type +\
'\nAge:', self.__age
This is the code for my main function (pet.py):
import classPet
def main():
# Prompt user to enter name, type, and age of pet
name = input('What is the name of the pet: ')
animal_type = input('What type of pet is it: ')
age = int(input('How old is your pet: '))
pets = classPet.Pet(name, animal_type, age)
print()
main()
In the code for your main function (pet.py), you are calling print without any parameters. You need to call print with your pet instance as a parameter:
pets = classPet.Pet(name, animal_type, age)
print(pets) # see here
You also need to fix an error in your __str__ method:
the __str__ method doesn't concatenate all of its arguments to a string like the print() function does it. Instead, it must return a single string.
In your __str__ method you are seperating your different parts of the string by commas. This will make python think that it's dealing with a tuple. I propose the following solution using pythons format function:
def __str__(self):
return "Pet Name: {}\nAnimal Type: {}\nAge: {}".format(self.__name, self.__animal_type, self.__age)
The {} parts in the string are placeholders that are replaced with the arguments in the parenthesis through the format function. They are replaced in order, so the first one is replaced with self.__name, etc.
Related
class Pet(object):
"""
Object that contains attributes relating to pets
Methods:
__init__: initializes a new object
__str__: prints an object
is_heavier: compares two pets' weights. Return True if self is heavier
than second, otherwise returns False.
is_older: compares two pets' ages. Returns true if self is older
than second, otherwise returns False.
Same_colour: compares two pets' colours. Returns True if colours match
Returns False if Colours don't match.
Attributes:
species: str of type of pet IE "dog" or "giraffe"
name: str listing the name of your pet IE "Joy" (She's a dog")
weight: float the weight of the pet in killograms
height: float the height of the pet in centimetres
age: int the age of the pet in years.
"""
def __init__(self, name, animal_type, age, weight, height):
self.__name = name
self.__animal_type = animal_type
self.__age = age
self.__heavier = weight
self.__taller = height
def set_name(self, name):
self.__name = name
def set_type(self, animal_type):
self.__animal_type = animal_type
def set_age(self, age):
self.__age = age
def get_name(self):
return self.__name
def get_animal_type(self):
return self.__animal_type
def get__age(self):
return self.__age
def get__heavier(self,heavier):
return self.__weight
def get__taller(self, taller):
return self.__height
def main():
name = input('What is the name of the pet: ')
animal_type = input('What type of pet is it: ')
age = int(input('How old is your pet: '))
pets = Pet(name, animal_type, age)
heavier = int(input('How much does your pet weight?: ')
print('This will be added to the records.')
print('Here is the data you entered: ')
print('Pet Name: ', pets.get_name())
print('Animal Type: ', pets.get_animal_type())
print('Age: ', pets.get__age())
print('Kg: ', pets.get__heavier())
main()
So This is supposed to be done by last Thursday, and I am STILL working on this assignment, and since it is quarantined so my teacher can't really help me with this work, and I kinda figure it out but it keeps giving me an error of the wrong spot of the code like the "print" is wrong or something like that.
I think something is wrong with this code, and I can't figure out why or what is wrong with this code. Can you guys please please please help me with good explanations?
the Title won't let me make my own so I HAD to choose that one. NOT MY FAULT! :)
you forgot to pass all argument to the Pet class when you initiated it
get__heavier and get__taller used not existed variables
Below is the working copy program
class Pet(object):
"""
Object that contains attributes relating to pets
Methods:
__init__: initializes a new object
__str__: prints an object
is_heavier: compares two pets' weights. Return True if self is heavier
than second, otherwise returns False.
is_older: compares two pets' ages. Returns true if self is older
than second, otherwise returns False.
Same_colour: compares two pets' colours. Returns True if colours match
Returns False if Colours don't match.
Attributes:
species: str of type of pet IE "dog" or "giraffe"
name: str listing the name of your pet IE "Joy" (She's a dog")
weight: float the weight of the pet in killograms
height: float the height of the pet in centimetres
age: int the age of the pet in years.
"""
def __init__(self, name, animal_type, age, weight, height):
self.__name = name
self.__animal_type = animal_type
self.__age = age
self.__heavier = weight
self.__taller = height
def set_name(self, name):
self.__name = name
def set_type(self, animal_type):
self.__animal_type = animal_type
def set_age(self, age):
self.__age = age
def get_name(self):
return self.__name
def get_animal_type(self):
return self.__animal_type
def get__age(self):
return self.__age
def get__heavier(self):
return self.__heavier
def get__taller(self):
return self.__taller
def main():
name = input('What is the name of the pet: ')
animal_type = input('What type of pet is it: ')
age = int(input('How old is your pet: '))
weight = int(input('How much does your pet weight?: '))
height = int(input('How much does your pet height?: '))
pets = Pet(name, animal_type, age, weight, height)
print('This will be added to the records.')
print('Here is the data you entered: ')
print('Pet Name: ', pets.get_name())
print('Animal Type: ', pets.get_animal_type())
print('Age: ', pets.get__age())
print('Kg: ', pets.get__heavier())
main()
I think error your generated on the basis of No or argument.
if you observe your code
def __init__(self, name, animal_type, age, weight, height):
self.__name = name
self.__animal_type = animal_type
self.__age = age
self.__heavier = weight
self.__taller = height
require total 5 argument while you passed only 3 of them
pets = Pet(name, animal_type, age)
correct format
pets = Pet(name, animal_type, age,weight,height)
I have a class Pet() and main() function as shown below. I get a syntax error, but it is not clear why.
class Pet(object):
def __init__(self, name, animal_type, age):
self.__name = name
self.__animal_type = animal_type
self.__age = age
def set_name(self, name):
self.__name = name
def set_type(self, animal_type):
self.__animal_type = animal_type
def set_age(self, age):
self.__age = age
def get_name(self):
return self.__name
def get_animal_type(self):
return self.__animal_type
def get__age(self):
return self.__age
def main():
name = input('What is the name of the pet: ')
animal_type = input('What type of pet is it: ')
age = int(input('How old is your pet: ')
pets = Pet(name, animal_type, age)
print('This will be added to the records.')
print('Here is the data you entered: ')
print('Pet Name: ', pets.get_name())
print('Animal Type: ', pets.get_animal_type())
print('Age: ', pets.get_age())
main()
I keep getting a syntax error for pets line
There are 2 errors in your code, first, your init method needs to be written with double underscore, like this __init__, and secondly, you are missing a ) on your age input line. If you put the code like this, it should work.
class Pet(object):
def __init__(self, name, animal_type, age):
self.__name = name
self.__animal_type = animal_type
self.__age = age
def set_name(self, name):
self.__name = name
def set_type(self, animal_type):
self.__animal_type = animal_type
def set_age(self, age):
self.__age = age
def get_name(self):
return self.__name
def get_animal_type(self):
return self.__animal_type
def get__age(self):
return self.__age
def main():
name = input('What is the name of the pet: ')
animal_type = input('What type of pet is it: ')
age = int(input('How old is your pet: '))
pets = Pet(name, animal_type, age)
print('This will be added to the records.')
print('Here is the data you entered: ')
print('Pet Name: ', pets.get_name())
print('Animal Type: ', pets.get_animal_type())
print('Age: ', pets.get__age())
main()
class Person:
def __init__(self, name, surname, age):
self.name = name
self.surname = surname
self.age = age
def show(self):
print(("Name: {}\nSurname: {}\nAge: {}").format(self.name, self.surname, self.age))
Is there more pythonic way to show these variables by function show?
I don't want spaghetti code when i have 34 variables in class
In the case you don't want to override __str__ and badly need show to print, not return data, it's still more pythonic to use format. I'd make few adjustment for your code:
def show(self):
person_info = "Name {name}\nSurname {surname}\nAge {age}".format(name=self.name, surname=self.surname, age=self.age)
print (person_info)
In general it's the same you had, just a bit more explicit.
Not sure if it is more Pythonic or not, but instead of defining show you can override __repr__ (you will need to return that string instead of printing it). Then instead of calling person_obj.show you can simply do print(person_obj).
class Person:
def __init__(self, name, surname, age):
self.name = name
self.surname = surname
self.age = age
def __repr__(self):
return "Name: {}\nSurname: {}\nAge: {}").format(self.name, self.surname, self.age)
print(Person('a','b', 'c'))
>> Name: a
Surname: b
Age: c
This will display correctly even if you have a list of persons:
print([Person('a', 'b', 'c'), Person('d', 'e', 'f')])
>> [Name: a
Surname: b
Age: c, Name: d
Surname: e
Age: f]
You can take advantage of the classes' internal __dict__ property to avoid typing all of the variables twice. Additionally, it's best to use the __repr__ function for representing your class:
class Person(object):
def __init__(self, name, surname, age):
self.name = name
self.surname = surname
self.age = age
def __repr__(self):
return '\n'.join([
'Name: {name}',
'Surname: {surname}',
'Age: {age}'
]).format(**self.__dict__)
john = Person('John', 'Doe', 42)
print(john)
Another step of abstraction you could take to avoid hardcoding the format string is to create a list of the properties that identify the instance and use them as follows:
class Person(object):
_identifiers = ('name', 'surname', 'age')
def __init__(self, name, surname, age):
self.name = name
self.surname = surname
self.age = age
def __repr__(self):
return '\n'.join(
'{k}: {v}'.format(k=key.capitalize(), v=self.__dict__[key])
for key in self._identifiers
)
john = Person('John', 'Doe', 42)
print(john)
Hi i have a python file that contains the class pets and a file conatins the class people and a main file
the code is this:
the pets code:
class Pet:
def __init__(self, name, age, sound, type):
self.name = name
self.age = age
self. sound = sound
self. type = type
class Dog(Pet):
def __init__(self, name, age):
super().__init__(name, age, "How How", "Dog")
class Cat(Pet):
def __init__(self, name, age):
super().__init__(name, age, "Mewo", "Cat")
this is the peoples file:
import Pets
class Person:
def __init__(self, gender, name, age):
self.gender = gender
self.name = name
self.age = age
self.pets = []
def addPet(self, pet):
if isinstance(pet, Pets.Pet):
self.pets.append(pet)
else:
print("This is not a pet pls try again.")
def printPets():
print("He has:")
for pet in self.pets:
print("A: " + pet.type+ " Named: " + pet.name)
And this is the Main file:
from Person import Person
import Pets
def Main():
p1 = Person("Male", "Bob", 18)
p1.addPet(Pets.Cat("Mitzi", 2))
p1.addPet(Pets.Dog("Rexi", 5))
print(p1.printPets)
if __name__ == "__main__":
Main()
the output that i get is:
<bound method Person.printPets of <Person.Person object at 0x7f413e3604e0>>
what is this and how do i fix it ??
thanx.
What you need is print(p1.printPets())
You need to invoke the method.
Else what you are doing is printing the method and what Python gives you is the method type (bound), instance type to which it belongs and address of the instance.
You just need to include () inside print() like this:
print(s1.avg())
I am working on an assignment for Python Programming 157 at my school.
I need to write a class called Pet that has the following data attributes:
__name (for the name of the pet)
__animal_type (Examples: "Cat", "Dog", and "Hamster" )
__age (for the pet's age)
__height (for the pet's height)
It needs to include
set_name
get_name
I have tried like 4 times and cannot seem to get it right... any clues on getting it started?
# The Pet Program.
class PetProgram:
# The __init__ method accepts an argument for the program
# and adds it to the __pets attribute.
def __init__(self, pet):
self.__pets = pet
# The name will add to the pet attribute.
def name(self, name):
self.__pets = name
def age(self, age):
self.__pets = age
def animal(self, animal):
self.__pets = animal
def height(self, height):
self.__pets = height
# The pets_return will show you the list.
def pets_return(self):
return self.__pets
# The Pet Program.
import petsprogram
def main():
# Enter the name.
petname = input('What is the name of the pet: ')
print 'This will be added to the record.'
savings.name(petname)
# Display the list.
print petsprogram
main()
Above is my latest try...no such luck...any help? Thanks in advance...
A class is not a program, a class should model a thing, like a pet. Therefore, to start off, you should name your class appropriately.
class Pet(object): # Pet derives from the object class, always do this
Now I think you want a constructor that takes the name of the pet, and perhaps the type of pet as well, so we'll define that.
def __init__(self, pet_name, pet_type):
self.pet_name = pet_name
self.pet_type = pet_type
You also need a get and set for the name:
def get_name(self):
return self.pet_name
def set_name(self, pet_name):
self.pet_name = pet_name
To use this class, you instantiate it into an instance of the class:
puppy = Pet('Rover', 'Dog')
puppy.get_name() # prints Rover
I hope that's enough to get you going. You should read up on OOP in Python as mentioned in the comments.
First, why are you using "private" __attributes? That doesn't seem warranted.
Second, you're assigning all your properties to the same instance variable:
self.__pets = pet
self.__pets = name
self.__pets = age
self.__pets = animal
self.__pets = height
You should be using something like
def __init__(self, pet, name, age, animal, height):
self.pet = pet
self.name = name
self.age = age
self.animal = animal
self.height = height
and you should definitely read the tutorial on classes before venturing any further.
I'm not sure where the __pets binding comes into play. Your initial description doesn't say anything about that. I would not have expected an object that represents a pet, as in, a singular pet, to have an attribute that was a list of pets. I would expect something like:
class PetProgram:
def __init__(self, name ='', age=0, type='Unknown', height=0):
self.__name = name
self.__age = age
self.__animal_type = type
self.__height = height
def get_name(self):
return self.__name
def set_name(self, name):
self.__name = name
I'm also not sure where the imports petprogram comes from... is that perchance what your supposed to call your module, and then the instructor has provided that as something you're supposed to run to test it?
(also, what's with all the __under_scores? is this something your teacher is encouraging?)
How does something like this look?
>>> class Pets:
def set_Name(self,name):
self.name=name
def get_Name(self):
return self.name
def set_Atype(self,atype):
self.atype=atype
def get_Atype(self):
return self.atype
def set_Age(self,age):
self.age=age
def get_Age(self):
return self.age
def set_Height(self,height):
self.height=height
def get_Height(self):
return self.height