如何在Python中为不同的MagicMock实例设置不同的属性？

from unittest.mock import MagicMock

# 创建两个独立的MagicMock实例
mock1 = MagicMock()
mock2 = MagicMock()

# 为每个实例设置不同属性
mock1.some_attr = "value_for_mock1"
mock2.some_attr = "value_for_mock2"

print(mock1.some_attr)  # 输出: value_for_mock1
print(mock2.some_attr)  # 输出: value_for_mock2

mock1.configure_mock(some_attr="value_A", method_return=100)
mock2.configure_mock(some_attr="value_B", method_return=200)

print(mock1.some_attr)          # 输出: value_A
print(mock1.method_return())    # 输出: 100
print(mock2.some_attr)          # 输出: value_B
print(mock2.method_return())    # 输出: 200

mock1.some_method.return_value = "result1"
mock2.some_method.side_effect = lambda x: f"result2_{x}"

print(mock1.some_method())      # 输出: result1
print(mock2.some_method("data")) # 输出: result2_data

from unittest.mock import MagicMock

# 场景：模拟两个数据库连接的不同查询结果
db_mock1 = MagicMock()
db_mock1.query.return_value = ["user1", "user2"]

db_mock2 = MagicMock()
db_mock2.query.side_effect = Exception("Connection failed")

# 测试用例
try:
    print(db_mock1.query())  # 输出: ['user1', 'user2']
    print(db_mock2.query())  # 抛出异常
except Exception as e:
    print(f"Error: {e}")      # 输出: Error: Connection failed