1.import io img = Image.open(fh, mode='r') roiImg = img.crop(box) imgByteArr = io.BytesIO() roiImg.save(imgByteArr, format='PNG') imgByteArr = imgByteArr.getvalue() 2.from PIL import Image import io # I don't know what Python version you're using, so…

/* * Java Bittorrent API as its name indicates is a JAVA API that implements the Bittorrent Protocol * This project contains two packages: * 1. jBittorrentAPI is the "client" part, i.e. it implements all classes needed to publish * files, share…

Lookup Text: 23,879.41 (20.8X faster) Sentence: 1.15 (23.9X faster) /// <summary> /// Hex string lookup table. /// </summary> private static readonly string[] HexStringTable = new string[] { ", "0A", "0B", "0C&quo…

用 System.Text.Encoding.Default.GetString() 转换时,byte array 中大于 127 的数据转 string 时会出问题. 把这里的 Default 换成 ASCII,UTF8,Unicode 都会有问题(转成的 string 再转回 byte array 数据不一致). 转过去还能再转回来的才是真汉子.这时需要用 System.Buffer.BlockCopy using System.IO; using System; class Program…

public static void BlockCopy(Array src, int srcOffset, Array dst, int dstOffset, int count); 将指定数目的字节从起始于特定偏移量的源数组复制到起始于特定偏移量的目标数组. /// <summary> /// C#中使用Buffer.BlockCopy()方法将string转换为byte array的方法 /// </summary> /// <param name="str&…

/********************************************************************************* * PHP write byte array to file * 说明: * 遇到需要将byte array写入file,结果找不到专门的字节写入的方法. * * 2017-10-23 深圳 南山平山村 曾剑锋 *************************************************************…

问题比较简单,直接上代码. private Image _Cover; [Size(SizeAttribute.Unlimited), ValueConverter(typeof(ImageValueConverter))] public Image Cover { get { if (_Cover == null && _Photo != null && _Photo.Length > 0) { using (MemoryStream stream = new Sy…

问题比较简单,直接上代码. private Image _Cover; [Size(SizeAttribute.Unlimited), ValueConverter(typeof(ImageValueConverter))] public Image Cover { get { ) { using (MemoryStream stream = new System.IO.MemoryStream(_Photo)) { System.Drawing.Image image = System.Dra…

遇到一个问题,如何通过dbus传送uint8数组元素 有3种方法, 1.直接传 ay 2.传  a(y) 3.xml定义为 ay,但是通过annotation 强行将 guchar 转为GVariant 可以参考: http://stackoverflow.com/questions/22937588/how-to-send-byte-array-over-gdbus https://developer.gnome.org/gio/stable/gdbus-codegen.html 如下图3中方…

转自Stackoverflow.备忘用. Question In Python 2 I could do the following: import numpy as np f = lambda x: x**2 seq = map(f, xrange(5)) seq = np.array(seq) print seq # prints: [ 0 1 4 9 16] In Python 3 it does not work anymore: import numpy as np f = lambd…