重装cryptography就好了. conda uninstall cryptography conda install cryptography https://github.com/pyca/cryptography/issues/4187…

Function group is loaded into runtime memory by the FIRST call of a function module inside this function group. See example below: I have a global variable defined in function group in X3C/504: Before I call any of the function module in this functio…

许多问题很难在开发的过程中就想的面面俱到,都是在实际应用.调试的过程中一一的优化的.由于easynvr的受众越来越多,因此也出现了好多在开发之初并没有留意的一些细节.我这次发现的问题就是给客户远程解决问题过程中发现的.在此记录下来方便自己,也方便大家了解. 问题概述 使用过easynvr的都知道,easynvr是通过通道配置来接入摄像头的,这些通道配置.通道展示--都是通过接口的调用来完成的.理论上,只要调用接口返回成功码,就表示该接口调用成功,后续操作得以进行. 接下来就是见证奇怪的时刻:在给…

Xcode中调试代码时,常常需要使用console窗口查看变量的信息,比如使用了如下的命令来输出有关UITableView中一个UITableViewCell的信息, po cell 令人感到意外的是,console窗口得到的输出是: error: Couldn't materialize struct: the variable 'cell' has no location, it may have been optimized out 从这样的输出看到了“it may have been o…

let say, we want to find the bottom left node in a tree.one way to do it is using global vars: /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ clas…

1.使用urllib模块(使用不方便,建议使用第二种) get请求: res = urlopen(url) from urllib.request import urlopen url = 'http://www.nnzhp.cn' print(urlopen(url))#返回http.client.HTTPResponse object at 0x00000235BA25A160 print(urlopen(url).read().decode())#返回get到的页面的源代码 # decod…

PHP函数库(other) Session函数: session_abort — Discard session array changes and finish session session_abort() finishes session without saving data. Thus the original values in session data are kept. 返回值:没有你返回值. session_cache_expire — 返回当前缓存的到期时间 session_…

The code for this tutorial can be downloaded here: threadworms.py or from GitHub. This code works with Python 3 or Python 2, and you need Pygame installed as well in order to run it. Click the animated gif to view a larger version. This is a tutorial…

http://wiki.nginx.org/HttpLuaModule#Directives Name ngx_lua - Embed the power of Lua into Nginx This module is not distributed with the Nginx source. See the installation instructions. Status This module is under active development and is production…

一.Pre Request Scripts Postman v0.10+ 版本支持pre-request scripts. prerequest script.png pre-request scripts是一个关联了收藏夹内request,并且在发送request之前执行的代码片段.这对于在request header中包含时间戳或者在URL参数中发送一个随机字符串都是非常有用的. 例如:如果要在request的header中包含一个时间戳,你可以设置一个环境变量由一个函数返回他的值. pos…