"""Utility class DotDict."""


class DotDict(dict):
    """A wrapper around dict to access its items using dot notation."""

    def __getattr__(self, item):
        """Get item from dictionary by it's key, using dot-notation.

        Args:
            item (str): key

        Returns:
            value, or None if there is no item with such key
        """
        return self.get(item)

    def __setattr__(self, key, value):
        """Set value in dictionary, using dot-notation.

        Args:
            key (str): item key
            value: item value
        """
        self[key] = value