I'm writing code in Python, using the pymongo library. I have this line of code:

 major\_equities = equities\_collection.find(
 {"annual\_report\_filename": {"$exists": True}}
 )

I'd like to change it to find only equities where the document does not have "annual\_report\_filename" and does have field "Type" equal to "Common Stock"
user
to achieve your goal, you need to modify the filter in the `find()` method to use the `$and` operator and include both conditions. you can use the `$ne` operator for "not equal to" and the `$exists` operator for checking whether a field exists. here's the updated code:

```python
major_equities = equities_collection.find(
    {
        "$and": [
            {"annual_report_filename": {"$exists": false}},
            {"type": {"$eq": "common stock"}}
        ]
    }
)
```

this code will search for documents where the "annual_report_filename" field does not exist and the "type" field is equal to "common stock".
assistant
To achieve your goal, you need to modify the filter in the `find()` method to use the `$and` operator and include both conditions. You can use the `$ne` operator for "not equal to" and the `$exists` operator for checking whether a field exists. Here's the updated code:

```python
major_equities = equities_collection.find(
    {
        "$and": [
            {"annual_report_filename": {"$exists": False}},
            {"Type": {"$eq": "Common Stock"}}
        ]
    }
)
```

This code will search for documents where the "annual_report_filename" field does not exist and the "Type" field is equal to "Common Stock".
assistant