TypeError：__ init __（）占用1个位置参数，但给出3个

Posted 2021-05-06

我知道这个标题对于一些古老的问题看起来很熟悉，但我看过它们中的每一个，没有一个能解决。这是我的代码：

TypeError: __init__() takes 1 positional argument but 3 were given

Traceback (most recent call last)
File "C:Usershp uservirtual_flasklibsite-packagesflaskapp.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "C:Usershp uservirtual_flasklibsite-packagesflaskapp.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "C:Usershp uservirtual_flasklibsite-packagesflaskapp.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:Usershp uservirtual_flasklibsite-packagesflask\_compat.py", line 33, in reraise
raise value
File "C:Usershp uservirtual_flasklibsite-packagesflaskapp.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "C:Usershp uservirtual_flasklibsite-packagesflaskapp.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:Usershp uservirtual_flasklibsite-packagesflaskapp.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:Usershp uservirtual_flasklibsite-packagesflask\_compat.py", line 33, in reraise
raise value
File "C:Usershp uservirtual_flasklibsite-packagesflaskapp.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "C:Usershp uservirtual_flasklibsite-packagesflaskapp.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:Usershp userPycharmProjectsflask123views.py", line 19, in create
create_post = Post(my_form.title.data, my_form.text.data)
TypeError: __init__() takes 1 positional argument but 3 were given
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我的课程如下：

models.朋友

from app import db
from datetime import datetime


class Post(db.Model):
    post_id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100))
    text = db.Column(db.Text())
    created_time = db.Column(db.DateTime())

    def __init__(self, title, text, created_time=None):
        self.title = title
        self.text = text
        if created_time is None:
            self.created_time = datetime.utcnow()
        else:
            self.created_time = created_time

views.朋友

from app import app, db
from flask import render_template, request, url_for
from forms import CreateForm
from models import Post


@app.route('/')
def homepage():
    return render_template('base.html')


@app.route('/create', methods=['GET', 'POST'])
def create():
    form = CreateForm(csrf_enabled=False)
    if request.method == 'GET':
        return render_template('create.html', form=form)
    if request.method == 'POST':
        if form.validate_on_submit():
            create_post = Post(form.title.data, form.text.data)
            db.session.add(create_post)
            db.session.commit()
    return redirect(url_for('homepage'))

我尝试了所有可能的解决方案，并检查了我的代码拼写错误。但我没有找到。

答案

错误

TypeError：__ init __（）占用1个位置参数，但给出3个

发生在代码处

create_post = Post(my_form.title.data, my_form.text.data)

不要将位置参数传递给Post对象的创建，而是传递keyword arguments：

create_post = Post(title=my_form.title.data, text=my_form.text.data)