LAmbda inside generators: select(s for s in Student if s.group in Group.select(lambda g: g.dept.number==1))[:]
LAmbda inside generators: select(s for s in Student if s.group in Group.select(lambda g: g.dept.number==1))[:]

ponyorm/pony,gwecho/pony,ponyorm/pony,gwecho/pony,gwecho/pony,ponyorm/pony,ponyorm/pony