如何从字典中提取特定的列键和值？

# 定义一个字典对象
data = {
    'name': 'John',
    'age': 25,
    'gender': 'male',
    'occupation': 'engineer'
}

# 提取特定列键和值
column_keys = ['name', 'age']  # 要提取的列键列表

for key in column_keys:
    value = data.get(key)
    if value is not None:
        print(f"{key}: {value}")
    else:
        print(f"{key} not found")

# 输出结果：
# name: John
# age: 25