Leonid Ganeline 1c81883d42 added docstrings where they missed (#6626) ...

This PR targets the `API Reference` documentation.
- Several classes and functions missed `docstrings`. These docstrings
were created.
- In several places this

```
except ImportError:
        raise ValueError(
```

        was replaced to 

```
except ImportError:
        raise ImportError(
```

2023-06-23 15:49:44 -07:00

..

__init__.py

nc/load (#5733)

2023-06-11 15:51:28 -07:00

dump.py

added docstrings where they missed (#6626)

2023-06-23 15:49:44 -07:00

load.py

Include placeholder value for all secrets, not just kwargs (#6421)

2023-06-19 15:41:45 +01:00

serializable.py

added docstrings where they missed (#6626)

2023-06-23 15:49:44 -07:00