Get the condition name from the condition description.

def __cond_from_desc(desc):
    """Get the condition name from the condition description."""
    # '{ 'code': 'conditon', 'detailed', 'exact', 'exact_nl'}
    for code, [condition, detailed, exact, exact_nl] in __BRCONDITIONS.items():
        if exact_nl == desc:
            return {CONDCODE: code,
                    CONDITION: condition,
                    DETAILED: detailed,
                    EXACT: exact,
                    EXACTNL: exact_nl
                    }
    return None