def to_camel_case(snake_case_str):
    """
    Returns `snake_case_str` (e.g. `some_str`) in CamelCase (e.g. `SomeStr`).

    :param snake_case_str: A string in `snake_case`
    :return: The string in `CamelCase`
    """
    els = [
        s[:1].upper() + s[1:]
        for s in snake_case_str.split("_")
    ]
    return "".join(els)