云9 CS50上的pylint错误消息

Question

我正在学习CS50课程，但在使用application.py时遇到问题。我在Cloud 9代码编辑器(Ace)中收到以下警告：

instance of SQLAlchemy has no column member
instance of SQLAlchemy has no integer member
instance of SQLAlchemy has no text member
instance of scoped_session has no add member
instance of scoped_session has no commit member
Class Registrants has no query member

我在主目录中创建了一个文件.pylintrc，并添加了以下两行：

ignored-modules=flask_sqlalchemy
ignored-classes=SQLObject,Registrant

这消除了大多数错误，但我只剩下：

instance of scoped_session has no add member
instance of scoped_session has no commit member

以下是导致问题的代码：

from flask import Flask, render_template, redirect, request, url_for
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)

# Flask-SQLAlchemy
app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
app.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:///froshims3.db"
app.config["SQLALCHEMY_ECHO"] = True
db = SQLAlchemy(app)

class Registrant(db.Model):

    __tablename__ = "registrants"
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.Text)
    dorm = db.Column(db.Text)

    def __init__(self, name, dorm):
        self.name = name
        self.dorm = dorm

@app.route("/")
def index():
    return render_template("index.html")

@app.route("/register", methods=["POST"])
def register():
    if request.form["name"] == "" or request.form["dorm"] == "":
        return render_template("failure.html")
    registrant = Registrant(request.form["name"], request.form["dorm"])
    db.session.add(registrant)
    db.session.commit()
    return render_template("success.html")

@app.route("/registrants")
def registrants():
    rows = Registrant.query.all()
    return render_template("registrants.html", registrants=rows)

@app.route("/unregister", methods=["GET", "POST"])
def unregister():
    if request.method == "GET":
        rows = Registrant.query.all()
        return render_template("unregister.html", registrants=rows)
    elif request.method == "POST":
        if request.form["id"]:
            Registrant.query.filter(Registrant.id ==    request.form["id"]).delete()
            db.session.commit()
        return redirect(url_for("registrants"))

Answer 1

需要在.pylintrc文件中添加：

ignored-classes=SQLObject,Registrant,scoped_session

显然，Python在运行时创建了一些类，而pylint无法获取这些信息。

我对这个答案并不满意，因为它忽略了这个问题，而不是解决它。如果有人有更好的解决方案，请让我知道。CS50的工作人员正在研究这一点，但还没有其他解决方案。

Answer 2

使用VSCode时，我必须在Python >Linting中添加以下项: Pylint Args设置。

--ignored-classes=SQLObject,Registrant,scoped_session