import datetime

def calculate_age(id_number):
    # 提取身份证号码中的出生日期
    birth_date = datetime.datetime.strptime(id_number[6:14], '%Y%m%d')
    
    # 获取当前日期
    today = datetime.datetime.today()
    
    # 计算年龄
    age = today.year - birth_date.year - ((today.month, today.day) < (birth_date.month, birth_date.day))
    
    return age

# 测试身份证号码
test_id_number = '110105199003076519'
calculate_age(test_id_number)