human
Solve the following python programming problem given the following code:
@ testing.crashes ('sqlite', ':memory: connection not suitable here') 
def test_orm_many_engines(self) : 
    metadata = MetaData (self.engine) 
    table1 = Table ('mytable', metadata, Column ('col1', Integer, primary_key = True, test_needs_autoincrement = True), Column ('col2', String (30))) 
    table2 = Table ('mytable2', m3, Column ('col1', Integer, primary_key = True, test_needs_autoincrement = True), Column ('col2', String (30)), Column ('col3', Integer, ForeignKey ('mytable.col1'))) 
    metadata.create_all () 
    m1 = mapper (A, table1, properties = { 
        'bs' : relationship (B, cascade = 'all, delete', order_by = table2.c.col1), 
}, _compiled_cache_size = 10) 
    m2 = mapper (B, table2, _compiled_cache_size = 10) 
    m3 = mapper (A, table1, non_primary = True) 
    @ profile_memory () 
    def go() : 
        engine = engines.testing_engine (options = { 
            'logging_name' : 'FOO', 
            'pool_logging_name' : 'BAR', 
            'use_reaper' : False, 
}) 
        sess = create_session (bind = engine) 
        a1 = A (col2 = 'a1') 
        a2 = A (col2 = 'a2') 
        a3 = A (col2 = 'a3') 
        a1.bs.append (B (col2 = 'b1')) 
        a1.bs.append (B (col2 = 'b2')) 
        a3.bs.append (B (col2 = 'b3')) 
        for x in [a1, a2, a3] : 
            sess.add (x) 
sess.flush () 
        sess.expunge_all () 
        alist = sess.query (A).order_by (A.col1).all () 
        eq_ ([A (col2 = 'a1', bs = [B (col2 = 'b1'), B (col2 = 'b2')]), A (col2 = 'a2', bs = []), A (col2 = 'a3', bs = [B (col2 = 'b3')])], alist) 
        for a in alist : 
            sess.delete (a) 
sess.flush () 
        sess.close () 
        engine.dispose () 
go () 
    metadata.drop_all () 
    del m1, m2, m3 
    assert_no_mappers () 

    
    

    Fix the buggy line: table2 = Table ('mytable2', m3, Column ('col1', Integer, primary_key = True, test_needs_autoincrement = True), Column ('col2', String (30)), Column ('col3', Integer, ForeignKey ('mytable.col1')))
assistant
#Here is Python code to fix the buggy line: table2 = Table ('mytable2', m3, Column ('col1', Integer, primary_key = True, test_needs_autoincrement = True), Column ('col2', String (30)), Column ('col3', Integer, ForeignKey ('mytable.

table2 = Table ('mytable2', metadata, Column ('col1', Integer, primary_key = True, test_needs_autoincrement = True), Column ('col2', String (30)), Column ('col3', Integer, ForeignKey ('mytable.col1')))