[Sqlalchemy-tickets] Issue #3648: Documentation: error in SQL Expression Language tutorial(?) (zzzeek/sqlalchemy)

[Joakim N. <iss...@bi...>]

New issue 3648: Documentation: error in SQL Expression Language tutorial(?)
https://bitbucket.org/zzzeek/sqlalchemy/issues/3648/documentation-error-in-sql-expression

Joakim Nybäck:

Hi,
I followed the SQLAlchemy SQL Expression Language tutorial from the beginning. I added the code as I went along, including the code for creating the two tables in the section "**Define and Create Tables**" (section 3.1.3 in the PDF version; the PDF is for Release 1.1.0b1 and dated 13-FEB-2016). When I execute the code an exception is thrown:

"UnboundExecutionError: MetaData object is not bound to an Engine or Connection.  Execution can not proceed without a database to execute against."

The code listed in the tutorial includes this line:


```
#!python

metadata = MetaData()
```

If I change that line to:


```
#!python

metadata = MetaData(bind=engine)
```


then the code works fine.