Flask返回错误：与MySQL服务器的连接丢失，系统错误：60

Question

我正在尝试将我的FLASK应用程序与本地主机（127.0.0.1:5000）上的MySQL连接，但收到以下错误。

super(Connection, self).__init__(*args, **kwargs2)
_mysql_exceptions.OperationalError: (2013, "Lost connection to MySQL server at 'waiting for initial communication packet', system error: 60")

我正在使用＆＃34; flask_mysqldb＆＃34;图书馆。当我试图填写表格并点击提交。它尝试连接到db但从未获得成功并返回错误。

请查看我的代码和帮助。

from flask import Flask, render_template, flash, redirect, url_for, request, session, logging
from data import Articles
from flask_mysqldb import MySQL 
from wtforms import Form, StringField, TextAreaField, PasswordField, validators
from passlib.hash import sha256_crypt


app = Flask("__name__")

# config MySQL
app.config["MYSQL_HOST"] = "127.0.0.1"
app.config["MYSQL_PORT"] = 5000
app.config["MYSQL_USER"] = "root"
app.config["MYSQL_DB"] = "myflaskapp"
app.config["MYSQL_CURSORCLASS"] = "DictCursor"

# init MySQL
mysql = MySQL(app)



Articles = Articles()


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

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

@app.route("/articles")
def articles():
    return render_template("articles.html", articles = Articles)

@app.route("/article/<string:id>/")
def article(id):
    return render_template("article.html", id=id)

# collect and validate user data
class RegisterForm(Form):
    name        = StringField('Name', [validators.Length(min=1, max=50)])
    username    = StringField('Username', [validators.Length(min=4, max=25)])
    email       = StringField('Email', [validators.Length(min=6, max=50)])
    password    = PasswordField('Password', [
            validators.DataRequired(),
            validators.EqualTo('confirm', message='Password do not match')
        ])
    confirm     = PasswordField('Confirm Password')

# insert user data to DB
@app.route("/register", methods=['GET', 'POST'])
def register():
    form = RegisterForm(request.form)

    if request.method == 'POST' and form.validate():
        name        = form.name.data
        email       = form.email.data
        username    = form.username.data
        password    = sha256_crypt.encrypt(str(form.password.data))

        # create cursor(handler) to connect DB
        cur = mysql.connection.cursor()

        cur.execute("INSERT INTO users(name, email, username, password) VALUES (%s, %s, %s, %s)", (name, email, username, password))

        # commit to db
        mysql.connection.commit()

        # close the connection
        cur.close()

        flash('You are now Registered', 'success')

        return redirect(url_for('index'))

    return render_template('register.html', form=form)



if __name__ == "__main__":
    app.run(debug=True)

以下是我正在使用的版本。

• Python：3.6
• MySQL：5.7.21

问：＆＃34; flask_mysqldb＆＃34;是否支持python 3.6？

问：如果需要，有什么好的选择？

• PyMySQL
• mysqlclient
• SQLAlchemy的

是的，mysqlclient也已安装。