def column_schema_to_keys(column_schema: ColumnSchema) -> str:
    """
    Generate a hashing key from a Columns Schema. For example:
    - ColumnSchema(logical_type=Double) -> "Double"
    - ColumnSchema(semantic_tags={"index"}) -> "index"
    - ColumnSchema(logical_type=Double, semantic_tags={"index", "other"}) -> "Double,index,other"

    Args:
        column_schema (ColumnSchema):

    Returns:
        str: hashing key
    """
    logical_type = column_schema.logical_type
    tags = column_schema.semantic_tags
    lt_key = None
    if logical_type:
        lt_key = type(logical_type).__name__

    tags = sorted(tags)
    if len(tags) > 0:
        tag_key = ",".join(tags)
        return f"{lt_key},{tag_key}" if lt_key is not None else tag_key

    elif lt_key is not None:
        return lt_key
    else:
        return ANY

    Generate a hashing key from a Columns Schema. For example:
    - ColumnSchema(logical_type=Double) -> "Double"
    - ColumnSchema(semantic_tags={"index"}) -> "index"
    - ColumnSchema(logical_type=Double, semantic_tags={"index", "other"}) -> "Double,index,other"

    Args:
        column_schema (ColumnSchema):

    Returns:
        str: hashing key
    
featuretools/feature_discovery/utils.py