为什么 sqlalchemy 插入“？” sqlite的价值？

Question

请帮忙解决问题。在数据库（sqlite）中创建表并在其中插入数据的问题。 难道是编码问题？或者可能还有差异版本包等？

从 build_database.py 开始得到这个

...
INSERT INTO good (art, size, timestamp) VALUES (?, ?, ?)
INSERT INTO good (art, size, timestamp) VALUES (?, ?, ?)
...

有人坚持吗（？

有3个文件：

config.py：

import os
import connexion
from flask_sqlalchemy import SQLAlchemy
from flask_marshmallow import Marshmallow


basedir = os.path.abspath(os.path.dirname(__file__))

# Create the Connexion application instance
connex_app = connexion.App(__name__, specification_dir=basedir)

# Get the underlying Flask app instance
app = connex_app.app

# Configure the SQLAlchemy part of the app instance
app.config['SQLALCHEMY_ECHO'] = True
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + os.path.join(basedir, 'ec.db')
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

# Create the SQLAlchemy db instance
db = SQLAlchemy(app)

# Initialize Marshmallow
ma = Marshmallow(app)

models.py

from datetime import datetime
from config import db, ma


class Good(db.Model):
    _tablename__ = 'good'
    good_id = db.Column(db.Integer, primary_key=True)
    art = db.Column(db.String(32), index=True)
    size = db.Column(db.String(32))
    timestamp = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)


class GoodSchema(ma.SQLAlchemyAutoSchema):
    class Meta:
        model = Good
        load_instance = True

build_database.py

import os
from config import db
from models import Good

# Data to initialize database with
GOODS = [
    {'art': 'art1', 'size': '42'},
    {'art': 'art2', 'size': '44'},
]

# Delete database file if it exists currently
if os.path.exists('ec.db'):
    os.remove('ec.db')

# Create the database
db.create_all()

# Iterate over the PEOPLE structure and populate the database
for good in GOODS:
    p = Good(art=good['art'], size=good['size'])
    db.session.add(p)

db.session.commit()

Answer 1

数据库表不可见，因为没有预装 PyCharm IDE 驱动

。就这样）