hi guys,
I'm just taking over a legacy piece of code where tables were hand created 

I'm trying to migrate this over to alembic. I dont have (want to use) any 
python models, so this is alembic by itself.

I'm unsure of two things:
1. How do I create the first migration - for my first migration, I want to 
snapshot the existing structure of the database. Most of the autogenerate 
takes place only if there is an existing set of python models. How do I do 
this in my case
2. How do I apply the migration ... without applying the migration. Since I 
need alembic to start managing my db, I realize I need to get it to create 
a "migrate_version" . However, I cant really apply the migration. How do I 
do this ? 

Thanks guys!

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