[英]Error: Could not locate a Flask application in VSCode
I am trying to learn Flask
using VScode.我正在尝试使用 VScode 学习Flask
。
The tutorial that I am following is: Python Flask Tutorial: Full-Featured Web App Part 1 - Getting Started .我关注的教程是: Python Flask 教程:全功能 Web 应用程序第 1 部分 - 入门。
I did the following things:我做了以下事情:
virtualenv venv
使用以下命令在文件夹中创建了一个新的 virtualenv: virtualenv venv
venv\Scripts\activate
(I am on Windows 10)将其激活为: venv\Scripts\activate
(我在 Windows 10 上) After that, I created a new directory named Flask_Blog
using mkdir Flask_Blog
and in it, I created a new flaskblog.py
file containing the following code:之后,我使用mkdir Flask_Blog
创建了一个名为Flask_Blog
的新目录,并在其中创建了一个包含以下代码的新flaskblog.py
文件:
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello():
return 'Hello'
Then, in the terminal of VScode
, I changed my working directory in order to be in the Flask_Blog
directory using cd Flask_Blog
.然后,在VScode
的终端中,我更改了我的工作目录,以便使用cd Flask_Blog
进入Flask_Blog
目录。
Now, when I am doing set FLASK_APP=flaskblog.py
followed by flask run
, I am getting the following error:现在,当我执行set FLASK_APP=flaskblog.py
后跟flask run
时,出现以下错误:
(venv) PS C:\Users\kashy\OneDrive\Desktop\Flask\Flask_Blog> flask run
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
Usage: flask run [OPTIONS]
Error: Could not locate a Flask application. You did not provide the "FLASK_APP" environment variable, and a "wsgi.py" or "app.py" module was not found in the current directory.
But但
When I do the same in the cmd
prompt, the code runs and I get to see the output.当我在cmd
提示符下执行相同操作时,代码运行并且我可以看到输出。
I am completely new to this.我对此完全陌生。 Can anyone please tell me what is the mistake I am doing in VSCode
and why is it working in the cmd
?谁能告诉我我在VSCode
中犯了什么错误,为什么它在cmd
中工作?
Issue raised in VsCode VsCode 中提出的问题
Under Powershell, you have to set the FLASK_APP environment variable as follows:在 Powershell 下,您必须按如下方式设置 FLASK_APP 环境变量:
$env:FLASK_APP = "webapp"
Then you should be able to run "python -m flask run" inside the hello_app folder.然后你应该能够在 hello_app 文件夹中运行“python -m flask run”。 In other words, PowerShell manages environment variables differently, so the standard command-line "set FLASK_APP=webapp" won't work.换句话说,PowerShell 以不同的方式管理环境变量,因此标准命令行“set FLASK_APP=webapp”将不起作用。
Try Set FLASK_APP = Full path of the folder/filename.py.尝试设置 FLASK_APP = 文件夹/文件名.py 的完整路径。
This worked for me这对我有用
I am trying to learn Flask
using VScode.我正在尝试使用 VScode 学习Flask
。
The tutorial that I am following is: Python Flask Tutorial: Full-Featured Web App Part 1 - Getting Started .我正在关注的教程是: Python Flask 教程:全功能 Web 应用程序第 1 部分 - 入门。
I did the following things:我做了以下事情:
virtualenv venv
使用: virtualenv venv
在文件夹中创建了一个新的 virtualenvvenv\Scripts\activate
(I am on Windows 10)将其激活为: venv\Scripts\activate
(我在 Windows 10 上) After that, I created a new directory named Flask_Blog
using mkdir Flask_Blog
and in it, I created a new flaskblog.py
file containing the following code:之后,我使用mkdir Flask_Blog
创建了一个名为Flask_Blog
的新目录,并在其中创建了一个包含以下代码的新flaskblog.py
文件:
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello():
return 'Hello'
Then, in the terminal of VScode
, I changed my working directory in order to be in the Flask_Blog
directory using cd Flask_Blog
.然后,在VScode
的终端中,我更改了我的工作目录,以便使用cd Flask_Blog
进入Flask_Blog
目录。
Now, when I am doing set FLASK_APP=flaskblog.py
followed by flask run
, I am getting the following error:现在,当我执行set FLASK_APP=flaskblog.py
后跟flask run
时,我收到以下错误:
(venv) PS C:\Users\kashy\OneDrive\Desktop\Flask\Flask_Blog> flask run
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
Usage: flask run [OPTIONS]
Error: Could not locate a Flask application. You did not provide the "FLASK_APP" environment variable, and a "wsgi.py" or "app.py" module was not found in the current directory.
But但
When I do the same in the cmd
prompt, the code runs and I get to see the output.当我在cmd
提示符中执行相同操作时,代码运行,我看到 output。
I am completely new to this.我对此完全陌生。 Can anyone please tell me what is the mistake I am doing in VSCode
and why is it working in the cmd
?谁能告诉我我在VSCode
中犯了什么错误,为什么它在cmd
中工作?
This worked for me on the VSCode:这在 VSCode 上对我有用:
$env:FLASK_APP= 'C:\Python\ex003\main:app' $env:FLASK_APP= 'C:\Python\ex003\main:app'
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