unresolved attribute “Column” in class “SQLAlchemy”

Question

i use pycharm 5.0 and python3.5.And i download all the liarbry by the build-in function of pycharm(setting-project-project interpreter-\"+\").other libraries appear well,but

Answer 1

here is what I do.

from flask_sqlalchemy import SQLAlchemy
from typing import Callable


class MySQLAlchemy(SQLAlchemy):  # Or you can add the below code on the SQLAlchemy directly if you think to modify the package code is acceptable.
    Column: Callable  # Use the typing to tell the IDE what the type is.
    String: Callable
    Integer: Callable


db = MySQLAlchemy(app)


class User(db.Model, UserMixin):
    __tablename__ = "users"
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(20))  # The message will not show: Unresolved attribute reference 'Column' for class 'SQLAlchemy' 

    def __init__(self, *args, **kwargs): 
        super().__init__(*args, **kwargs)


def create_test_data():
    db.create_all()
    test_user = User(name='Frank')  # I add __init__, so it will not show you ``Unexpected argument``
    db.session.add(test_user)
    db.session.commit()