3.4. UML Class Diagram¶

3.4.1. Attributes¶

class Astronaut:
    firstname: str
    lastname: str

```mermaid
classDiagram

class Astronaut {
    firstname: str
    lastname: str
}
```

class Astronaut:
    def say_hello():
        pass

```mermaid
classDiagram

class Astronaut {
    say_hello()
}
```

class Astronaut:
    def say_hello(firstname: str, lastname: str):
        pass

```mermaid
classDiagram

class Astronaut {
    say_hello(firstname: str, lastname: str)
}
```

class Astronaut:
    def say_hello() -> str:
        pass

```mermaid
classDiagram

class Astronaut {
    say_hello() str
}
```

from abc import abstractmethod, ABCMeta

class Astronaut(metaclass=ABCMeta):
    @abstractmethod
    def say_hello():
        pass

```mermaid
classDiagram

class Astronaut {
    say_hello()*
}
```

class Astronaut:
    @staticmethod
    def say_hello():
        pass

```mermaid
classDiagram

class Astronaut {
    say_hello()$
}
```

class Astronaut:
    firstname: str
    lastname: str

    def say_hello(name: str) -> str:
        pass

```mermaid
classDiagram

class Astronaut {
    firstname: str
    lastname: str

    say_hello(name: str) str
}
```

class Astronaut:
    firstname: str
    lastname: str

    def say_hello() -> str:
        pass

```mermaid
classDiagram

class Astronaut {
    +firstname: str
    +lastname: str
    +say_hello() str
}
```

class Astronaut:
    _firstname: str
    _lastname: str

    def _say_hello() -> str:
        pass

```mermaid
classDiagram

class Astronaut {
    #firstname: str
    #lastname: str
    #say_hello() str
}
```

class Astronaut:
    __firstname: str
    __lastname: str

    def __say_hello() -> str:
        pass

```mermaid
classDiagram

class Astronaut {
    -firstname: str
    -lastname: str
    -say_hello() str
}
```