python - 导入错误 : "flask_sqlalchemy" could not be resolved

Question

即使安装了flask-sqlachemy，我也无法导入flask_sqlalchemy

from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy 
 # ^this line shows error ImportError: "flask_sqlalchemy" could not be resolved

app = Flask(__name__)
@app.route('/')
def index():
    return render_template('index.html')

我没有使用任何虚拟环境并且已经安装了 Flask-sqlalchemy 显示

(base) sachin@sachin:~/Coding/flask/blog$ pip install Flask-SQLAlchemy
Requirement already satisfied: Flask-SQLAlchemy in /home/sachin/anaconda3/lib/python3.8/site-packages (2.4.4)
Requirement already satisfied: SQLAlchemy>=0.8.0 in /home/sachin/anaconda3/lib/python3.8/site-packages (from Flask-SQLAlchemy) (1.3.20)
Requirement already satisfied: Flask>=0.10 in /home/sachin/anaconda3/lib/python3.8/site-packages (from Flask-SQLAlchemy) (1.1.2)
Requirement already satisfied: Jinja2>=2.10.1 in /home/sachin/anaconda3/lib/python3.8/site-packages (from Flask>=0.10->Flask-SQLAlchemy) (2.11.2)
Requirement already satisfied: itsdangerous>=0.24 in /home/sachin/anaconda3/lib/python3.8/site-packages (from Flask>=0.10->Flask-SQLAlchemy) (1.1.0)
Requirement already satisfied: click>=5.1 in /home/sachin/anaconda3/lib/python3.8/site-packages (from Flask>=0.10->Flask-SQLAlchemy) (7.1.2)
Requirement already satisfied: Werkzeug>=0.15 in /home/sachin/anaconda3/lib/python3.8/site-packages (from Flask>=0.10->Flask-SQLAlchemy) (1.0.1)
Requirement already satisfied: MarkupSafe>=0.23 in /home/sachin/anaconda3/lib/python3.8/site-packages (from Jinja2>=2.10.1->Flask>=0.10->Flask-SQLAlchemy) (1.1.1)

pip freeze 显示它已经安装 -

Flask==1.1.2
Flask-SQLAlchemy==2.4.4

Answer 1

我有同样的错误。通过在 VS Code 中执行以下操作来更改我的系统 python:
在 View 菜单下选择“显示命令托盘”。然后您可以从命令面板中选择的命令之一是“Python:选择解释器”。
选择此选项将允许您选择要使用的 Python 版本。