小编Nip*_*arg的帖子

当我用它运行任何命令时,Conda会出错.

Traceback (most recent call last):
  File "/usr/local/bin/conda", line 7, in <module>
    from conda.cli.main import main
  File "/usr/local/lib/python2.7/dist-packages/conda/cli/__init__.py", line 8, in <module>
    from .main import main  # NOQA
  File "/usr/local/lib/python2.7/dist-packages/conda/cli/main.py", line 46, in <module>
    from ..base.context import context
  File "/usr/local/lib/python2.7/dist-packages/conda/base/context.py", line 18, in <module>
    from ..common.configuration import (Configuration, MapParameter, PrimitiveParameter,
  File "/usr/local/lib/python2.7/dist-packages/conda/common/configuration.py", line 40, in <module>
    from ruamel.yaml.comments import CommentedSeq, CommentedMap  # pragma: no cover
ImportError: No module named ruamel.yaml.comments

我有一个 React 前端应用程序，它使用 react-router 创建不同的路由。在开发服务器上它工作正常，但是当我构建项目时，它在直接使用不同的路由访问它时给了我 404。网站完美打开xyz.net。当我尝试使用xyz.net/login.

这是我的 nginx 配置文件

server {

listen 80;
server_name  xyz.net www.xyz.net;
root /root/frontend/react/build/;
index index.html;


location /api/ {

    include proxy_params;
    proxy_pass http://localhost:8000/;
}

}

此代码将输出记录为零.输出应为6.

function sum(a,b){
  r=a+b;
  return r; 
}

r=sum(2,9);
r1=sum(1,4);
diff=r-r1;

console.log(diff);

我在python中使用pyqrcode模块并使用它生成QR代码.如何将徽标放在QR码的中心.

代码看起来像这样

import pyqrcode
data = "Hello World!!"

number = pyqrcode.create(data)
number.png('xyz.png', scale=int(scale))

with open('xyz.png', "rb") as f:
    return HttpResponse(f.read(), content_type="image/png")

或者有没有其他方法来做这个而不是pyqrcode？