def read_csv_value(csv_row: str, column: int) -> int:
    """Returns an integer value at a given column in a csv row.

    Args:
        csv_row: The comma separated string to read.
        column: The index of the column to be read.

    Returns:
        The integer value in the specified location if a value exists.
        Returns 0 as a default value if the cell is empty.

    Example:
        >>> row = "0,10,20,30,40,50"
        >>> read_csv_value(row, 3)
        30
    """
    value = csv_row.split(",")[column]
    return int(value if value else 0)