Problem with scan in Python Redis

You need to remove the value from the original Redis key stored in the project startup, so use Scan_iter to facilitate the relevant key and delete it.

There are two performance issues to be aware of

1. Scan_iter's fuzzy matching filter should be correct, otherwise it will bring a lot of fearless query,

For example: The original Redis storage a:b:c and Scan time more space a:b:c

2. There are a lot of keys to delete when you use Delete (*key) to delete the key list at once instead of one delete

Problem with scan in Python Redis