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micro:bit 微控制器教程 · App Inventor 2 中文网
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micro:bit 微控制器教程
教程概述
下载和准备
下载资源
App Inventor 端设置
Designer 页面设置
积木编程
步骤1：蓝牙初始化
步...
Python __str__ versus __unicode__
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It depends. Because python3 does not uses unicode but instead str ;) for python 2 unicode
– Eddwin Paz
Oct 3 '17 at 1:04
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Python error “ImportError: No module named”
...e the issue was I was using python driver.py when I should have been using python3 driver.py since I installed with pip3.
– Eric Wiener
Mar 17 '19 at 20:26
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ZeroMQ实例-使用ZMQ(ZeroMQ)进行局域网内网络通信 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的消息发送和接收首先在机器中安装zmq库步骤如下：1）下载zeromq的源代码，Zer...本文内容摘要：1）安装zeromq、2）实例说明使用zmq进行网络间的消息发送和接收
首先在机器中安装zmq库
步骤如下：
1）下载zeromq的源代码，ZeroMQ...
How to save and load cookies using Python + Selenium WebDriver
... with newer code and missing import added:
$ cat work-auth.py
#!/usr/bin/python3
# Setup:
# sudo apt-get install chromium-chromedriver
# sudo -H python3 -m pip install selenium
import time
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
chrome_options = Opti...
bash: mkvirtualenv: command not found
...mmand to install specific version of python in env
virtualenv -p /usr/bin/python3.6 venv
step 4
sudo pip install virtualenvwrapper
step 5
sudo nano ~/.bashrc
step 6
Add this two line code at the end of the bashrc file
export WORKON_HOME=~/.virtualenvs
source /usr/local/bin/virtu...
No module named pkg_resources
... I'm using Python 3 so I had to run sudo apt-get install --reinstall python3-pkg-resources and that fixed it. Thank you!
– Robert Townley
Jul 5 '17 at 13:28
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第一个Hello,OS World操作系统 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...汇编编译工具，用户将我们的汇编代码编译为二进制。（下载地址）
Bochs：运行os的虚拟机工具，模拟加载我们生成的软盘映像，并运行os。（下载地址）
代码如下：
;--------------------------------------------------------------
; 平...
libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...结，特此写在这里，方便给同样刚入门的朋友指引。
一.下载安装
1.到http://curl.haxx.se/download.html上下载最新版本，由于公司的机器安装rpm有依赖关系，所以直接下载了source
2.编译。解压后进入curl的目录，直接执行 make all ...
Which is faster in Python: x**.5 or math.sqrt(x)?
...y faster than sqrt(x).
For the Python 3.0 the result is the opposite:
$ \Python30\python -mtimeit -s"from math import sqrt; x = 123" "x**.5"
1000000 loops, best of 3: 0.803 usec per loop
$ \Python30\python -mtimeit -s"from math import sqrt; x = 123" "sqrt(x)"
1000000 loops, best of 3: 0.695 usec ...