raise ValueError("check_hostname requires server_hostname")





ValueError: check_hostname requires server_hostname


关闭VPN即可！

ValueError: check_hostname requires server_hostname

Python





```python
import os
import re
def all_path(dirname):
    result = []
    for maindir, subdir, file_name_list in os.walk(dirname):
        for filename in file_name_list:
            apath = os.path.join(maindir, filename)
            result.append(apath)
    return result
result = []
for name in all_path("."):
    if name.endswith(".c") or name.endswith(".h"):
        singleTxt = open(name, "r").readlines()
        for k, line in enumerate(singleTxt):
            singleTxt[k] = re.sub("//[\s\S]*(?=[\n])", "", singleTxt[k])
            singleTxt[k] = re.sub("^[\s]*\n$", "", singleTxt[k])
        singleTxt_join = "".join(singleTxt)
        singleTxt_join = re.sub("/\*{1,2}[\s\S]*?\*/", "", singleTxt_join)
        open("temp.txt", "w").write(singleTxt_join)
        singleTxt = open("temp.txt", "r").readlines()
        result.append("/**\n")
        result.append("   * Copyright 2021-2021 Beijing Grant Technology Co., Ltd.\n")
        result.append("*/\n")
        result.append(f"/*{str(name)}*/\n")
        result.extend(singleTxt)
open("result.txt", "w").writelines(result)
```


打包：
```
pip install pyinstaller
```

打包方法：
```
pyinstaller -F setup.py 打包exe
pyinstaller -F -w setup.py 不带控制台的打包
pyinstaller -F -i xx.ico setup.py 打包指定exe图标打包
```

Python 删除 C语言中的注释 打上标 软 著

Python





```python
import requests
def save_picture_and_get_url(pic_path: str):
    pic_name = pic_path.split('/')[-1]
    url = "http://10.10.90.88:8113/upload"
    with open(pic_path, 'rb') as f:
        files = {'file': f}
        data = {"bucketName": "algorithmgroupfiles",
                'inputDir': 'chengguan/',
                'persistLink': 'true'}
        res = requests.request(method="POST", url=url, data=data, files=files)
    return res.json()['data'][pic_name]  # 返回url
if __name__ == '__main__':
    name = "./testpicture/img1coj3.jpg"
    print(save_picture_and_get_url(name))
```

Python minIO

执行：




```
mlflow ui --backend-store-uri sqlite:////mlflow/mlflow.db --default-artifact-root /mlflow/artifacts --host 0.0.0.0 --port 50004
```

报错：
```
2021/12/15 11:23:01 WARNING mlflow.store.db.utils: SQLAlchemy engine could not be created. The following exception is caught.
(sqlite3.OperationalError) unable to open database file
```

解决：

```shell
mkdir -p /mlflow/artifacts
```

mlflow (sqlite3.OperationalError) unable to open database file

官网文档：[https://docs.python.org/zh-cn/3/library/concurrent.futures.html](https://docs.python.org/zh-cn/3/library/concurrent.futures.html)






Python有GIL，故多线程最好只用于io密集型程序，比如需要网络下载很多个文件，下面截取部分代码来展示如何使用：
```python
from concurrent.futures import ThreadPoolExecutor, as_completed # 导入需要的包
threadPool = ThreadPoolExecutor(max_workers=140) # 线程池的池子大小，最多同时执行多少个任务，submit的任务数超过这个数字后后续任务会自行等待进入线程池
all_task = [threadPool.submit(self.download_01, url, path, delay * 1.5)
            for delay, url in enumerate(urls)] # 使用线程池ThreadPoolExecutor的submit方法发起任务，列表生成式里面装了所有任务的返回句柄。self.download_01是我的函数名称，url, path, delay * 1.5 全是我的self.download_01函数的参数。
for task in as_completed(all_task): # as_completed 可以判断列表里的线程是否完成
    data = task.result()
    print("任务{} down load success".format(data)) # 打印结果
threadPool.shutdown(wait=True) #　释放线程池资源
```

Python 线程池 ThreadPoolExecutor 使用教程 使用例子 使用示例

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