如何从过滤器的字典列表中提取数据

filters = [
    {'name': 'filter1', 'value': 'value1'},
    {'name': 'filter2', 'value': 'value2'},
    {'name': 'filter3', 'value': 'value3'}
]

# 提取'name'键的值
names = [f['name'] for f in filters]
print(names)  # 输出: ['filter1', 'filter2', 'filter3']

# 提取'value'键的值
values = [f['value'] for f in filters]
print(values)  # 输出: ['value1', 'value2', 'value3']

filters = [
    {'name': 'filter1', 'value': 'value1'},
    {'name': 'filter2', 'value': 'value2'},
    {'name': 'filter3', 'value': 'value3'}
]

names = []
values = []

for f in filters:
    names.append(f['name'])
    values.append(f['value'])

print(names)  # 输出: ['filter1', 'filter2', 'filter3']
print(values)  # 输出: ['value1', 'value2', 'value3']

try:
    values = [f['nonexistent_key'] for f in filters]
except KeyError as e:
    print(f"KeyError: {e}")
    values = []  # 或者提供一个默认值

values = []
for f in filters:
    if 'value' in f:
        values.append(f['value'])
    else:
        values.append(None)  # 或者提供一个默认值