import ast


def get_table_bounds_tuple(table):
    """
    returns 4tuple of floats representing North,East,South,West bounds

    bounds represent decimal degrees latitude/longitude (inclusive)

    Keyword Parameters:
    table  -- Dictionary, representing current a DWSupport data table

    >>> test_table1 = {'bounds': 'None'}
    >>> get_table_bounds_tuple(test_table1) #Expect nothing
    >>> test_table2 = {'bounds': '59.9, None, 75, None'}
    >>> get_table_bounds_tuple(test_table2)
    (59.9, None, 75, None)
    >>> test_table3 = {'bounds': '60, -99.99, 75.0, -140'}
    >>> get_table_bounds_tuple(test_table3)
    (60, -99.99, 75.0, -140)
    """
    bounds_tuple = ast.literal_eval(table['bounds'])
    return bounds_tuple