python 报错AttributeError: 'MongoBase' object has no attribute 'collection'
时间: 2023-10-25 11:10:37 浏览: 141
这个报错可能是因为你的代码中使用了 MongoDB 的一个不存在的集合(collection)名字或者是在 MongoBase 对象上调用了不存在的 collection 方法。你需要检查你的代码,确保你的 MongoDB 连接配置正确并且你的代码在正确的数据库和集合(collection)上进行操作。你可以尝试使用 MongoDB 官方的 Python 驱动程序 PyMongo 来连接和操作 MongoDB 数据库。如果你需要更多的帮助,请提供更多的代码细节和上下文信息。
相关问题
AttributeError: 'ExecutionEnvironment' object has no attribute 'from_collection'
如果您在 PyFlink 中使用 `ExecutionEnvironment` 对象时出现了 `'ExecutionEnvironment' object has no attribute 'from_collection'` 的错误,可能是因为您使用的是 PyFlink 1.10 及以下版本。
在 PyFlink 1.10 及以下版本中,确实没有提供 `from_collection` 方法。如果您想使用类似的方法将 Python 集合转换为 PyFlink 数据集,可以使用 `from_elements` 方法。示例如下:
```
from pyflink.dataset import ExecutionEnvironment
env = ExecutionEnvironment.get_execution_environment()
data = env.from_elements([(1, 'Hello'), (2, 'World')])
data.print()
env.execute()
```
如果您使用的是 PyFlink 1.11 及以上版本,可以使用 `from_collection` 方法。示例如下:
```
from pyflink.dataset import ExecutionEnvironment
env = ExecutionEnvironment.get_execution_environment()
data = env.from_collection([(1, 'Hello'), (2, 'World')])
data.print()
env.execute()
```
请注意,PyFlink 1.11 及以上版本的 `from_collection` 方法需要将 Python 集合作为参数传递给它。
AttributeError: 'Namespace' object has no attribute 'checkpoint'
This error message is indicating that you are trying to access an attribute called `checkpoint` on an object of the `Namespace` class, but that attribute does not exist on that object.
The `Namespace` class is used to represent a collection of command-line arguments that have been parsed by the `argparse` module in Python. When you define a set of command-line arguments using `argparse`, you can then parse those arguments into a `Namespace` object using the `parse_args()` method.
If you are trying to access a specific argument value that was parsed into the `Namespace` object, you need to use the name of the argument as the attribute name. For example, if you have an argument called `--checkpoint` and you want to access its value, you would use `args.checkpoint` (assuming `args` is the `Namespace` object returned by `parse_args()`).
If you are still encountering this error, you may want to double-check that you have defined the `checkpoint` argument correctly in your `argparse` code and that you are using the correct attribute name to access its value in your script.
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