Gemini says this, but I don’t want to hacky up code and it get replaced on update:

[code]
1. How to Fix the “Write” Error in red.py
When writing time-series data using RedisTimeSeries (usually via the TS.ADD or TS.INCRBY commands), Redis will often auto-create the key if it doesn’t exist. However, it will throw the TSDB: the key does not exist error if:

You are trying to apply a rule (TS.CREATERULE) to a key that isn’t created yet.

You are trying to alter a key (TS.ALTER) before it has data.

You are using a specific client wrapper or parameters that disable auto-creation.

The Fix: Wrap your write operation in a try/except block. If it fails because the key is missing, explicitly create the key (TS.CREATE) and then retry the write.

Python
import redis
from redis.exceptions import ResponseError

# Assuming ‘r’ is your Redis connection
key_name = “my_metric_name”
timestamp = “*” # * means current time in RedisTimeSeries
value = 42

try:
# Attempt to write the data
r.ts().add(key_name, timestamp, value)
except ResponseError as e:
if “TSDB: the key does not exist” in str(e):
# 1. Create the key explicitly (you can add retention, labels, etc. here)
r.ts().create(key_name)
# 2. Retry the write
r.ts().add(key_name, timestamp, value)
else:
# If it’s a different error, raise it
raise e

[/code]