adding libraries

python/libraries/utility-libraries/libraries.py

@@ -0,0 +1,37 @@
+import sys
+from typing import Any, TypeVar, Type
+
+
+config_inst_t = TypeVar('config_inst_t', bound='config.config.Config')
+
+
+def export(fn: callable) -> callable:
+    mod = sys.modules[fn.__module__]
+    if hasattr(mod, '__all__'):
+        mod.__all__.append(fn.__name__)
+    else:
+        mod.__all__ = [fn.__name__]
+    return fn
+
+
+def set_config(
+    config_inst: Type[config_inst_t],
+    key: str,
+    default: str = None,
+    cast: Any = None,
+) -> None:
+    """Sets the config variable on the instance of a class.
+
+    Parameters
+    ----------
+    config_inst : Type[config_inst_t]
+        Instance of the config class.
+    key : str
+        The key referencing the config variable.
+    default : str, optional
+        The default value.
+    cast : Any, optional
+        The type of the variable.
+    """
+    config_var = key.lower().replace('.', '_')
+    setattr(config_inst, config_var, config_inst.get(key, default, cast))