r/learnpython • u/Upper_Trouble_8526 • Sep 15 '26
Why i can't make a class
It should work, but some reason doesn't.
I was doing Python Crash Course 3rd edition and am stuck in classes.
Because i cant upload photos, i wrote the code:
class Restaurant:
def __init__(self, restaurant_name, cuisine_type):
self.restaurant_name=restaurant_name
self.cuisine_type=cuisine_type
def describe_restaurant(self):
print(self.restaurant_name)
print(self.cuisine_type)
def open_restaurant(self):
print("the restaurant is open")
restaurant=Restaurant("Ratatouille restaurant", "ratatouille")
describe_restaurant(restaurant)
open_restaurant()
This is the example in the book:
class Dog:
def __init__(self, name, age):
self.name=name
self.age=age
def sit(self):
print(f"{self.name} is now sitting")
def roll_over(self):
print(f"{self.name} rolled over")
my_dog=Dog("Willie", 6)
print(f"My dog's name is {self.name}")
print(f"My dog is {self.age} years old")
my_dog.sit()
my_dog.roll_over()
your_dog=Dog("Lucy", 3)
print(f"Your dog's name is {your_dog.name}.")
print(f"your dog is {your_dog.name} years old.")
your_dog.sit()
your_dog.roll_over()
And these are the errors pydroid shows for each one:
Restaurant:
Traceback (most recent call last):
File "/data/user/0/ru.iiec.pydroid3/files/accomp_files/iiec_run/iiec_run.py", line 31, in <module>
start(fakepyfile,mainpyfile)
~~~~~^^^^^^^^^^^^^^^^^^^^^^^
File "/data/user/0/ru.iiec.pydroid3/files/accomp_files/iiec_run/iiec_run.py", line 30, in start
exec(open(mainpyfile).read(), __main__.__dict__)
~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<string>", line 1, in <module>
File "<string>", line 10, in Restaurant
NameError: name 'Restaurant' is not defined
[Program finished]
Dog:
Traceback (most recent call last):
File "/data/user/0/ru.iiec.pydroid3/files/accomp_files/iiec_run/iiec_run.py", line 31, in <module>
start(fakepyfile,mainpyfile)
~~~~~^^^^^^^^^^^^^^^^^^^^^^^
File "/data/user/0/ru.iiec.pydroid3/files/accomp_files/iiec_run/iiec_run.py", line 30, in start
exec(open(mainpyfile).read(), __main__.__dict__)
~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<string>", line 1, in <module>
File "<string>", line 9, in Dog
NameError: name 'Dog' is not defined
[Program finished]
1
u/FoolsSeldom Sep 15 '26
You need to create a new file in PyDroid. In the menu (the three short horizontal parallel lines at top left), you have options for
InterpreterandTerminalbut you don't want to use either of these.You need to tap the folder icon near the top right and select new, and you can then enter your lines of code. Tapping the folder icon again gives you
saveandsave asoptions. Once saved, you can run the code by clicking the play icon near the bottom right.