Question

我正在尝试使用db向sqlalchemy表中插入一些虚拟值。但是我遇到'AttributeError: 'tuple' object has no attribute 'keys'错误，

from sqlalchemy import Table, Column, Integer, String, Float, create_engine, MetaData
from sqlalchemy.orm import sessionmaker, scoped_session
from sqlalchemy.ext.declarative import declarative_base
engine= create_engine('sqlite:///test.db')
Session = sessionmaker(bind=engine)
metadata = MetaData(bind=engine)
s = Session()
Base = declarative_base()
Base.metadata.create_all(engine)
Base.metadata.bind = engine

s.execute('DROP TABLE IF EXISTS person')
s.execute(
'CREATE TABLE person (id INTEGER NOT NULL, '
'             name VARCHAR(255),'
'             PRIMARY KEY (id))')
s.commit()
for i in range(10):
    row = ('name-{}'.format(i),)
    s.execute("INSERT INTO person (name) VALUES (?)",(row))
s.commit()

尝试运行以上代码时，我得到以下AttributeError：

Traceback (most recent call last):
  File "C:\Users\ashesh\DataWarehouse\Projects\Project-1\project1.py", line 30, in <module>
    s.execute("INSERT INTO person (name) VALUES (?)",(row))
  File "C:\Users\DELL\Anaconda3\lib\site-packages\sqlalchemy\orm\session.py", line 1176, in execute
bind, close_with_result=True).execute(clause, params or {})
  File "C:\Users\DELL\Anaconda3\lib\site-packages\sqlalchemy\engine\base.py", line 948, in execute
return meth(self, multiparams, params)
  File "C:\Users\DELL\Anaconda3\lib\site-packages\sqlalchemy\sql\elements.py", line 269, in _execute_on_connection
return connection._execute_clauseelement(self, multiparams, params)
  File "C:\Users\DELL\Anaconda3\lib\site-packages\sqlalchemy\engine\base.py", line 1028, in _execute_clauseelement
keys = list(distilled_params[0].keys())
AttributeError: 'tuple' object has no attribute 'keys'

Answer 1

您可以改用以下语法：

for i in range(10):
    row = 'name-{}'.format(i)
    s.execute("INSERT INTO person (name) VALUES (:name)", {'name':row})

SQLAlchemy属性错误

1 个答案: