fish 1.1 is a very nice module which can be used for your python scripts if you need some kind of progressbar and you would like to have one with a unique touch 
Recently I ran into the following error when tried to execute a SQl Create Script which I had automatically generated using Mysql Workbench:
ERROR 1005 (HY000) ... Can't create table ... (errno: 150)
The problem occurs when different foreign key constrains for different tables have the same name, which was the case for me because I had to connect some already existing tables and had overseen the already existing foreign key constraint names. The foreign key names for at table can be seen by using the “Foreign Keys” tab which shows up after having selected the designated table.
If you generate a new foreign key relation using 
unique constraint names will be created automatically.
… in a nutshell
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