编程平台：
1. Windows 7 ( 64位操作系统 )
2. Anaconda2 ( Python 2.7 version )
参考文档：
1. Tello SDK 使用说明
https://terra-1-g.djicdn.com/2d4dce68897a46b19fc717f3576b7c6a/Tello%20%E7%BC%96%E7%A8%8B%E7%9B%B8%E5%85%B3/For%20Tello/Tello%20SDK%20%E4%BD%BF%E7%94%A8%E8%AF%B4%E6%98%8E-%E4%B8%AD%E6%96%871.3_1122.pdf
https://dl-cdn.ryzerobotics.com/downloads/Tello/Tello_SDK_2.0_%E4%BD%BF%E7%94%A8%E8%AF%B4%E6%98%8E.pdf
2. 程序样例
https://dl-cdn.ryzerobotics.com/downloads/tello/20180222/Tello3.py
3. Tello-Python
https://github.com/dji-sdk/Tello-Python
4. python从入门到精通
https://edu.csdn.net/course/detail/5017
https://pypi.tuna.tsinghua.edu.cn/simple/opencv-python/
将下载的文件 opencv_python-4.1.2.30-cp27-cp27m-win_amd64.whl 复制到 d:\Anaconda2\Lib\site-packages 目录下
打开一个命令行窗口: 开始-->所有程序-->Anaconda2 (64-bit)-->Anaconda prompt(Anaconda2)
安装 opencv-python : pip install opencv_python-4.1.2.30-cp27-cp27m-win_amd64.whl
3. boost，ffmpeg，libh264decoder
下载 tello_video_dll(ForWin64).zip 压缩包( 仅适用于win64 ）
https://raw.githubusercontent.com/dji-sdk/Tello-Python/master/tello_video_dll(ForWin64).zip
将解压后的所有文件复制到 d:\Anaconda2\Lib\site-packages 目录下
Tello-Python 编程:
1. Tello3.py
第 53 行代码 msg = input(" ") 改为 msg = raw_input(" ")
