找不到模块错误:找不到烧瓶模块

时间:2020-04-18 09:50:30

标签: python flask virtualenv

我正在上有关Udemy的Python课程。这是程序的后端部分,在Visual Studio代码中的虚拟环境上运行。

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

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI']='postgresql://postgres:********@localhost/height-email_collector'
db = SQLAlchemy(app)

class Data(db.Model):
    __tablename__ ="data"
    id =db.Column(db.Integer, primary_key=True)
    email_ =db.Column(db.String(120), unique=True)
    height_ =db.Column(db.Integer)

    def __init__(self, email_,height_):
        self.email_ = email_
        self.height_ = height_

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

@app.route("/success", methods =['POST'])              
def success():
    if request.method=='POST':
        email = request.form["email_name"]
        height = request.form["height_name"]
        print(email, height)
        data = Data(email,height)
        db.session.add(data)
        db.session.commit()
        return render_template('success.html')    

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

当我执行代码时,这就是我得到的:

(virtual) C:\Users\lenovo\Desktop\My_Python\Py_html> py -3 App10.py
Traceback (most recent call last):
  File "App10.py", line 1, in <module>
    from flask import Flask, render_template, request
ModuleNotFoundError: No module named 'flask'

即使我确实重新安装了软件包,但也无法解决问题

1 个答案:

答案 0 :(得分:1)

在控制台中,当您输入py -3 App10.py时,可能未使用虚拟环境(安装Flask的位置)的python,而是使用了默认的(PATH的)Python。

如果您在目录C:\Users\lenovo\Desktop\My_Python\venv中使用virtualenv创建了一个虚拟环境,则可能需要尝试以下操作:

C:\Users\lenovo\Desktop\My_Python\venv\Scripts\python.exe App10.py