def resolve(obj_name: str):
    root, *chain = obj_name.split(".")
    names = globals()
    obj = names.get(root)
    for attr_name in chain:
        obj = getattr(obj, attr_name, None)
    return obj

def safe_import(module_name: str):
    try:
        module = __import__(module_name)
    except ImportError:
        module = None
    return module

def full_resolve(obj_name: str):
    root, *chain = obj_name.split(".")
    names = globals()
    if root in names:
         obj = names.get(root)
    else:
        obj = safe_import(root)
    for attr_name in chain:
        obj = getattr(obj, attr_name, None)
    return obj