Abstract Classes in Python

example.py

from abc import ABC, abstractmethod
### Example 1
class Animal(ABC):
    @abstractmethod
    def move(self):
        pass
a = Animal() 
# TypeError: Can't instantiate abstract class Animal with abstract methods move

### Example 2
class Animal(): # still can be instantiated
    @abstractmethod
    def move(self):
        pass
a = Animal() # No errors