The `class` keyword in Python can be used to define a class. A class can be thought of as a template for creating an object. 

For example the code below defines a class:

```
# Define MyDog class
class MyDog:
    def bark(self):
        return "Woof!"
```

From this class definition, a MyDog object can be created and used. For example:

```
# Create a new instance of the MyDog class
dog = MyDog()

# Call the bark method
dog.bark()  # Returns: “Woof!”
```

As in any programming language, Python classes are a complex and nuanced subject. Please let me know if you need help with a specific aspect of Python classes.
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