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docs(en): add comment for cursor api

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Adam Ji 2023-11-21 10:42:14 +08:00
parent 07187b08bc
commit 1de3af6c16
1 changed files with 24 additions and 19 deletions
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docs/en/14-reference/03-connector/07-python.mdx
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@ -436,11 +436,22 @@ The `TaosConnection` class and the `TaosResult` class already implement all the
:::note :::note
The TaosCursor class uses native connections for write and query operations. In a client-side multi-threaded scenario, this cursor instance must remain thread exclusive and cannot be shared across threads for use, otherwise, it will result in errors in the returned results. The TaosCursor class uses native connections for write and query operations. In a client-side multi-threaded scenario, this cursor instance must remain thread exclusive and cannot be shared across threads for use, otherwise, it will result in errors in the returned results.
The best practice for TaosCursor is to create a cursor at the beginning of a query and close it immediately after use. Please avoid reusing the same cursor for multiple executions.
::: :::
</TabItem> </TabItem>
<TabItem value="rest" label="REST connection"> <TabItem value="rest" label="REST connection">
##### Use of the RestClient class
The `RestClient` class is a direct wrapper for the [REST API](/reference/rest-api). It contains only a `sql()` method for executing arbitrary SQL statements and returning the result.
```python title="Use of RestClient"
{{#include docs/examples/python/rest_client_example.py}}
```
For a more detailed description of the `sql()` method, please refer to [RestClient](https://docs.taosdata.com/api/taospy/taosrest/restclient.html).
##### Use of TaosRestCursor class ##### Use of TaosRestCursor class
The `TaosRestCursor` class is an implementation of the PEP249 Cursor interface. The `TaosRestCursor` class is an implementation of the PEP249 Cursor interface.
@ -452,15 +463,9 @@ The `TaosRestCursor` class is an implementation of the PEP249 Cursor interface.
- `cursor.rowcount` : For write operations, returns the number of successful rows written. For query operations, returns the number of rows in the result set. - `cursor.rowcount` : For write operations, returns the number of successful rows written. For query operations, returns the number of rows in the result set.
- `cursor.description` : Returns the description of the field. Please refer to [TaosRestCursor](https://docs.taosdata.com/api/taospy/taosrest/cursor.html) for the specific format of the description information. - `cursor.description` : Returns the description of the field. Please refer to [TaosRestCursor](https://docs.taosdata.com/api/taospy/taosrest/cursor.html) for the specific format of the description information.
##### Use of the RestClient class :::note
The best practice for TaosRestCursor is to create a cursor at the beginning of a query and close it immediately after use. Please avoid reusing the same cursor for multiple executions.
The `RestClient` class is a direct wrapper for the [REST API](/reference/rest-api). It contains only a `sql()` method for executing arbitrary SQL statements and returning the result. :::
```python title="Use of RestClient"
{{#include docs/examples/python/rest_client_example.py}}
```
For a more detailed description of the `sql()` method, please refer to [RestClient](https://docs.taosdata.com/api/taospy/taosrest/restclient.html).
</TabItem> </TabItem>
<TabItem value="websocket" label="WebSocket connection"> <TabItem value="websocket" label="WebSocket connection">
@ -554,6 +559,16 @@ The `TaosConnection` class and the `TaosResult` class already implement all the
</TabItem> </TabItem>
<TabItem value="rest" label="REST connection"> <TabItem value="rest" label="REST connection">
##### Use of the RestClient class
The `RestClient` class is a direct wrapper for the [REST API](/reference/rest-api). It contains only a `sql()` method for executing arbitrary SQL statements and returning the result.
```python title="Use of RestClient"
{{#include docs/examples/python/rest_client_with_req_id_example.py}}
```
For a more detailed description of the `sql()` method, please refer to [RestClient](https://docs.taosdata.com/api/taospy/taosrest/restclient.html).
##### Use of TaosRestCursor class ##### Use of TaosRestCursor class
As the way to connect introduced above but add `req_id` argument. As the way to connect introduced above but add `req_id` argument.
@ -565,16 +580,6 @@ As the way to connect introduced above but add `req_id` argument.
- `cursor.rowcount` : For write operations, returns the number of successful rows written. For query operations, returns the number of rows in the result set. - `cursor.rowcount` : For write operations, returns the number of successful rows written. For query operations, returns the number of rows in the result set.
- `cursor.description` : Returns the description of the field. Please refer to [TaosRestCursor](https://docs.taosdata.com/api/taospy/taosrest/cursor.html) for the specific format of the description information. - `cursor.description` : Returns the description of the field. Please refer to [TaosRestCursor](https://docs.taosdata.com/api/taospy/taosrest/cursor.html) for the specific format of the description information.
##### Use of the RestClient class
The `RestClient` class is a direct wrapper for the [REST API](/reference/rest-api). It contains only a `sql()` method for executing arbitrary SQL statements and returning the result.
```python title="Use of RestClient"
{{#include docs/examples/python/rest_client_with_req_id_example.py}}
```
For a more detailed description of the `sql()` method, please refer to [RestClient](https://docs.taosdata.com/api/taospy/taosrest/restclient.html).
</TabItem> </TabItem>
<TabItem value="websocket" label="WebSocket connection"> <TabItem value="websocket" label="WebSocket connection">