I ran into a warning (1300, "Invalid utf8mb4 character string: 'C3D545'") 
when inserting or updating a `blob` and apparently that’s expected behavior 
as per MySQL bug 79317 <https://bugs.mysql.com/bug.php?id=79317>. However, 
according to one of the comments 
<https://bugs.mysql.com/bug.php?id=79317#c439353> the solution would be to 
use the “*_binary* character-set introducer 

How would I specify that in SQLAlchemy for `blob` columns?


SQLAlchemy - 
The Python SQL Toolkit and Object Relational Mapper


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