Python SQL Alchemy:表主键-意外的关键字参数错误

关于

primary\u key=True

，我不断得到以下错误。请有人指出我哪里出错了。我试着遵循：

---

---

Python是一种区分大小写的语言

• column

  和

  column

  是sqlalchemy中不同的可调用项

• table

  和

  table

  也是不同的可调用项

• float

  是python数据类型，而sqlalchemy类型是

  float

尝试将代码段改写为：

from sqlalchemy import *
from sqlalchemy.dialects import *
metadata = MetaData()
mydata123 = Table("dailymarketdata", metadata, 
                  Column('data_id', mysql.BIGINT, primary_key=True), 
                  Column('dt', Date), 
                  Column('security_id', mysql.VARCHAR), 
                  Column('open', Float), 
                  Column('high', Float), 
                  Column('low', Float), 
                  Column('close', Float), 
                  Column('ma200', Float), 
                  Column('rtrend', mysql.TINYINT))

TypeError                                 Traceback (most recent call last)
<ipython-input-350-bd385371a391> in <module>()
  2 
  3 mydata123 = table("dailymarketdata", metadata, 
----> 4                  column('data_id', mysql.BIGINT, primary_key=True),
  5              column('dt', Date),
  6              column('security_id', mysql.VARCHAR),

TypeError: column() got an unexpected keyword argument 'primary_key'

`AttributeError: 'MetaData' object has no attribute 'key'

from sqlalchemy import *
from sqlalchemy.dialects import *
metadata = MetaData()
mydata123 = Table("dailymarketdata", metadata, 
                  Column('data_id', mysql.BIGINT, primary_key=True), 
                  Column('dt', Date), 
                  Column('security_id', mysql.VARCHAR), 
                  Column('open', Float), 
                  Column('high', Float), 
                  Column('low', Float), 
                  Column('close', Float), 
                  Column('ma200', Float), 
                  Column('rtrend', mysql.TINYINT))