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To pass partition information from

asset_a

to

asset_b

using an

asset_sensor

, you can follow these steps: 1. Define the Asset Sensor: When defining your

asset_sensor

, you can access the latest materialization records, which include partition information. The sensor can then create a

RunRequest

for

asset_b

with the appropriate partition key. 2. Access Partition Information: Within the sensor, you can access the partition key from the latest materialization of

asset_a

using the

latest_materialization_records_by_partition

method or by accessing the

event_log_entry

for the materialization event, which contains the partition key. 3. Create a RunRequest: Use the partition information to create a

RunRequest

for

asset_b

. You can set the partition key in the

RunRequest

by including it in the

tags

dictionary with the key

dagster/partition

. Here's a conceptual example based on the documentation:

python from dagster import asset_sensor, RunRequest, AssetKey  @asset_sensor(asset_key=AssetKey("asset_a")) def asset_a_sensor(context):     materialization_records = context.latest_materialization_records_by_partition(AssetKey("asset_a"))     for partition, materialization in materialization_records.items():         # Access the partition key from the materialization record         partition_key = materialization.partition                  # Create a RunRequest for asset_b with the partition key         yield RunRequest(             run_key=f"asset_b_{partition_key}",             run_config={                 # Your run config here             },             tags={                 "dagster/partition": partition_key             }         )

In this example,

latest_materialization_records_by_partition

is used to get the latest materialization records for

asset_a

, and for each partition, a

RunRequest

is created for

asset_b

with the corresponding partition key. Please note that the exact implementation details may vary based on your specific use case and the version of Dagster you are using. If you need to access additional metadata from the materialization event, you can do so by reading it off of the

event_log_entry

as mentioned in the documentation. Remember to replace the placeholder comments and values with your actual run configuration and logic as needed. If you have further questions or need more detailed guidance, please refer to the [Dagster documentation](https://docs.dagster.io/concepts/partitions-schedules-sensors/sensors) on sensors and asset materialization.