python3提示run get exception ModuleNotFoundError(“No module named ‘sklearn‘“)

问题描述

提示：这里描述具体问题：
1.在启动python3的flask server时提示

 * Serving Flask app 'common.app' (lazy loading)
 * 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

run get exception ModuleNotFoundError("No module named 'sklearn'")

2.在启动python3的flask server时提示

 * Serving Flask app 'common.app' (lazy loading)
 * 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

run get exception ModuleNotFoundError("No module named 'skopt'")

3.提示：ModuleNotFoundError: No module named ‘xxxxxxx’
例如：

Traceback (most recent call last):
  File "./app_test.py", line 4, in 
    from common.app import App
  File "/home/zx/zxtuned/common/app.py", line 6, in 
    from flask_cors import CORS 
ModuleNotFoundError: No module named 'flask_cors'

对应pip安装即可

pip3 install flask_cors

安装完成提示：

Collecting flask_cors
  Downloading Flask_Cors-3.0.10-py2.py3-none-any.whl (14 kB)
Requirement already satisfied: Six in /usr/lib/python3/dist-packages (from flask_cors) (1.14.0)
Requirement already satisfied: Flask>=0.9 in /usr/local/lib/python3.8/dist-packages (from flask_cors) (2.1.2)
Requirement already satisfied: itsdangerous>=2.0 in /usr/local/lib/python3.8/dist-packages (from Flask>=0.9->flask_cors) (2.1.2)
Requirement already satisfied: importlib-metadata>=3.6.0; python_version < "3.10" in /usr/local/lib/python3.8/dist-packages (from Flask>=0.9->flask_cors) (4.11.3)
Requirement already satisfied: Jinja2>=3.0 in /usr/local/lib/python3.8/dist-packages (from Flask>=0.9->flask_cors) (3.1.2)
Requirement already satisfied: Werkzeug>=2.0 in /usr/local/lib/python3.8/dist-packages (from Flask>=0.9->flask_cors) (2.1.2)
Requirement already satisfied: click>=8.0 in /usr/local/lib/python3.8/dist-packages (from Flask>=0.9->flask_cors) (8.1.3)
Requirement already satisfied: zipp>=0.5 in /usr/lib/python3/dist-packages (from importlib-metadata>=3.6.0; python_version < "3.10"->Flask>=0.9->flask_cors) (1.0.0)
Requirement already satisfied: MarkupSafe>=2.0 in /usr/local/lib/python3.8/dist-packages (from Jinja2>=3.0->Flask>=0.9->flask_cors) (2.1.1)
Installing collected packages: flask-cors
Successfully installed flask-cors-3.0.10

---

原因分析：

提示：这里填写问题的分析：由于python3的环境没有安装sklearn和optimize

---

解决方案：

提示：这里填写该问题的具体解决方案：

1.安装skleran

pip3 install scikit-learn

安装完成提示

Collecting scikit-learn
  Downloading scikit_learn-1.0.2-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (26.7 MB)
     |████████████████████████████████| 26.7 MB 25 kB/s 
Requirement already satisfied: numpy>=1.14.6 in /usr/local/lib/python3.8/dist-packages (from scikit-learn) (1.22.3)
Collecting threadpoolctl>=2.0.0
  Downloading threadpoolctl-3.1.0-py3-none-any.whl (14 kB)
Collecting joblib>=0.11
  Downloading joblib-1.1.0-py2.py3-none-any.whl (306 kB)
     |████████████████████████████████| 306 kB 935 kB/s 
Requirement already satisfied: scipy>=1.1.0 in /usr/local/lib/python3.8/dist-packages (from scikit-learn) (1.8.0)
Installing collected packages: threadpoolctl, joblib, scikit-learn
Successfully installed joblib-1.1.0 scikit-learn-1.0.2 threadpoolctl-3.1.0

2.安装optimize

pip3 install scikit-optimize

安装完成提示

Collecting scikit-optimize
  Downloading scikit_optimize-0.9.0-py2.py3-none-any.whl (100 kB)
     |████████████████████████████████| 100 kB 418 kB/s 
Requirement already satisfied: scipy>=0.19.1 in /usr/local/lib/python3.8/dist-packages (from scikit-optimize) (1.8.0)
Collecting pyaml>=16.9
  Downloading pyaml-21.10.1-py2.py3-none-any.whl (24 kB)
Requirement already satisfied: numpy>=1.13.3 in /usr/local/lib/python3.8/dist-packages (from scikit-optimize) (1.22.3)
Requirement already satisfied: scikit-learn>=0.20.0 in /usr/local/lib/python3.8/dist-packages (from scikit-optimize) (1.0.2)
Requirement already satisfied: joblib>=0.11 in /usr/local/lib/python3.8/dist-packages (from scikit-optimize) (1.1.0)
Requirement already satisfied: PyYAML in /usr/lib/python3/dist-packages (from pyaml>=16.9->scikit-optimize) (5.3.1)
Requirement already satisfied: threadpoolctl>=2.0.0 in /usr/local/lib/python3.8/dist-packages (from scikit-learn>=0.20.0->scikit-optimize) (3.1.0)
Installing collected packages: pyaml, scikit-optimize
Successfully installed pyaml-21.10.1 scikit-optimize-0.9.0

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