Python SqlAlchemy | Error On Create Table

I'm a beginner of "Python with SqlAlchemy". I try the following to create the table in "MySQL" Database.

My Code is :

import pandas as pd 
from sqlalchemy import create_engine
from sqlalchemy import MetaData, Column, Table, ForeignKey
from sqlalchemy import Integer, String

#DB Connection String
conn_str = "mysql+pymysql://root:*****@localhost/globalTracker?charset=utf8&use_unicode=0"

engine = create_engine(conn_str)

metadata = MetaData()

user = Table('users', metadata,
  Column('user_id', Integer, primary_key=True),
  Column('name', String(40)),
  Column('age', Integer),
  Column('password', String(80)),
  mysql_engine='InnoDB'
)
user.create(engine, checkfirst=True)

I don't know the mistake on my code.

ERROR:

 AttributeError                            Traceback (most recent call last)
 /home/shankar/.local/lib/python3.5/site-packages/sqlalchemy/sql/elements.py in __getattr__(self, key)
 731         try:
--> 732             return getattr(self.comparator, key)
 733         except AttributeError:

 AttributeError: 'Comparator' object has no attribute '_columns'

 During handling of the above exception, another exception occurred:

 AttributeError                            Traceback (most recent call last)
 <ipython-input-46-d21d5be2c28c> in <module>()
 16   Column('age', Integer,
 17   Column('password', String(80)),
 ---> 18   mysql_engine='InnoDB'
 19 ))
 20 user.create(engine, checkfirst=True)

 /home/shankar/.local/lib/python3.5/site-packages/sqlalchemy/sql/schema.py in __init__(self, *args, **kwargs)
 1212                 args.append(DefaultClause(self.server_onupdate,
 1213                                           for_update=True))
 -> 1214         self._init_items(*args)
 1215 
 1216         util.set_creation_order(self)

 /home/shankar/.local/lib/python3.5/site-packages/sqlalchemy/sql/schema.py in _init_items(self, *args)
 81         for item in args:
 82             if item is not None:
 ---> 83                 item._set_parent_with_dispatch(self)
 84 
 85     def get_children(self, **kwargs):

 /home/shankar/.local/lib/python3.5/site-packages/sqlalchemy/sql/base.py in _set_parent_with_dispatch(self, parent)
431     def _set_parent_with_dispatch(self, parent):
432         self.dispatch.before_parent_attach(self, parent)
--> 433         self._set_parent(parent)
434         self.dispatch.after_parent_attach(self, parent)
435 

/home/shankar/.local/lib/python3.5/site-packages/sqlalchemy/sql/schema.py in _set_parent(self, table)
1289                 ))
1290 
-> 1291         if self.key in table._columns:
1292             col = table._columns.get(self.key)
1293             if col is not self:

/home/shankar/.local/lib/python3.5/site-packages/sqlalchemy/sql/elements.py in __getattr__(self, key)
736                     type(self).__name__,
737                     type(self.comparator).__name__,
--> 738                     key)
739             )
740 

 AttributeError: Neither 'Column' object nor 'Comparator' object has an attribute '_columns'

Kindly notice my bug or give me a steps for creating table in MySQL Database. [From Scratch]