is_container_type.py

def is_container_type(type_hint: Any) -> bool:
    """\
    :return: for containers you might add to a dataclass, like List[...] but types like str.
    """
    origin = get_origin(type_hint) or type_hint
    
    if origin is str:
        return False
        
    if isinstance(origin, type):
        return issubclass(origin, collections.abc.Container)
    
    return False
    
# Test
from typing import List, Dict, Set, Tuple, Union, Optional

# Standard containers
assert is_container_type(list) is True
assert is_container_type(dict) is True
assert is_container_type(set) is True

# Generic versions
assert is_container_type(List[int]) is True
assert is_container_type(Dict[str, int]) is True
assert is_container_type(Set[float]) is True
assert is_container_type(Tuple[int, str]) is True

# Non-containers
assert is_container_type(int) is False

# Container-like objects (and strings... which only contain characters so are not wanted here)
assert is_container_type(str) is False
assert is_container_type(Union[int, str]) is False
assert is_container_type(Optional[int]) is False