下面是我的燒瓶代碼、文件夾結構和錯誤回溯。我沒有收到名為 Flask 的模塊錯誤`from flask import render_template, request, jsonifyimport Flaskimport numpy as npimport tracebackimport pickleimport pandas as pd# App definitionapp = Flask(__name__,template_folder='templates')# importing modelswith open('C:/Users/xyz/Temp_Pred/temp_pred.pkl', 'rb') as f:   regressor = pickle.load (f)with open('C:/Users/xyz/Temp_Pred/lm_columns_columns.pkl', 'rb') as f:   model_columns = pickle.load (f)@app.route('/')def welcome():   return "Temperature Prediction"@app.route('/predict', methods=['POST','GET'])def predict():   if Flask.request.method == 'GET':       return "Prediction page"   if Flask.request.method == 'POST':       try:           json_ = request.json           print(json_)           query_ = pd.get_dummies(pd.DataFrame(json_))           query = query_.reindex(columns = model_columns, fill_value= 0)           prediction = list(regressor(query))           return jsonify({               "prediction":str(prediction)           })       except:           return jsonify({               "trace": traceback.format_exc()               })if __name__ == "__main__":   app.run()Traceback 錯誤語句 ` (base) C:\Users\xyz>cd C:\Users\xyz\Temp_Pred\myflaskenv\Scripts（基礎）C:\Users\xyz\Temp_Pred\myflaskenv\Scripts>activate(myflaskenv) (基礎) C:\Users\xyz\Temp_Pred\myflaskenv\Scripts>cd C:\Users\xyz\Temp_Pred但是版本 20.0.2 可用。您應該考慮通過“python -m pip install --upgrade pip”命令進行升級。(myflaskenv) (base) C:\Users\xyz\Temp_Pred>set FLASK_APP=app.py(myflaskenv) (base) C:\Users\xyz\Temp_Pred>set FLASK_ENV=development(myflaskenv) (base) C:\Users\xyz\Temp_Pred>flask run * Serving Flask app "app.py" (延遲加載) * Environment: development * Debug mode: on * Restarting with stat * Debugger is active！* 調試器 PIN：239-673-122 * 在http://127.0.0.1:5000/上運行（按 CTRL+C 退出）127.0.0.1 - - [15/Apr/2020 10:55:33] "[35m [1mGET / HTTP/1.1[0m” 500 - Traceback（最近一次調用最后一次）：文件“C:\Users\xyz\Temp_Pred\app.py”，第 2 行，在 import Flask ModuleNotFoundError: No module named 'Flask'