class_docstr: A Database. Encapsulates a url and an SQLAlchemy engine with a pool of
  connections.
class_docstr_tok: ["A","Database",".","Encapsulates","a","url","and","an","SQLAlchemy","engine","with","a","pool","of","connections","."]
docstr: Closes the Database.
docstr_tok: ["Closes","the","Database","."]
code: def close(self):
      """Closes the Database."""
      self._engine.dispose()
      self.open = False
  
imports: import os
  from sys import stdout
  from collections import OrderedDict
  from contextlib import contextmanager
  from inspect import isclass
  import tablib
  from docopt import docopt
  from sqlalchemy import create_engine, exc, inspect, text
label_desc: Use image node_id 2 for calling the Database obj's underlying member method code with example usage: obj.close() without return types