[bytes] 英文文档: class bytes([source[, encoding[, errors]]]) Return a new “bytes” object, which is an immutable sequence of integers in the range 0 <= x < 256. bytes is an immutable version of bytearray – it has the same non-mutating methods and the sa…
背景 平时工作因为有批量线上数据进行更新,通过Python程序连接数据库,利用连接池和gevent的并发性能,处理大量数据. 因为数据方提供的数据表结构中带有varbinary类型字段,并非全部,所以在使用Python程序时,导致报错 TypeError: Object of type ‘bytes’ is not JSON serializable 经过多方查证了解到关于Python中bytes和bytearray两种类型区别 1. 关于bytearray类型的用法 bytearray() 方…
package { import flash.utils.ByteArray; /** * 输出ByteArray为16进制 * @author Rise */ public class Byte2Hex { public static function Trace(bytes:ByteArray):void { if (bytes == null) { trace("bytes is null"); return; } var length:int = getHexLen(bytes…
1.参考文档 class bytearray([source[, encoding[, errors]]]) Return a new array of bytes. The bytearray class is a mutable sequence of integers in the range 0 <= x < 256. It has most of the usual methods of mutable sequences, described in Mutable Sequence…
#########sample########## sqlite3.OperationalError: Could not decode to UTF-8 column 'logtype' with text 将 with connection.cursor() as c: c.execute("select id,name from district_info where p_id=0") provinces = c.fetchall() 调整为 con = sqlite3.conn…
英文文档: class bytearray([source[, encoding[, errors]]]) Return a new array of bytes. The bytearray class is a mutable sequence of integers in the range 0 <= x < 256. It has most of the usual methods of mutable sequences, described in Mutable Sequence…
最近研究人脸识别,需要用python调用so动态库,涉及到c/c++中的指针字符串转Python的bytes对象的问题. 按照ctypes的文档,直观方式是先创建对应的类型数组,再将指针取地址一一赋值: from ctypes import * p)() ): p[i] = i b=bytes(bytearray(p)) print(b) from ctypes import * p=(c_char * 10)() for i in range(10): p[i] = i b=byte…
//最小矩形(非透明最小区域) public static function getMinRect(target:BitmapData):Rectangle{ return target.getColorBoundsRect(0xffffffff,0x00000000,false); } //去除多余透明区域 public static function removeTransparentRect(target:BitmapData,minRect:Rectangle):BitmapDa…
2. Built-in Functions https://docs.python.org/3.4/library/functions.html?highlight=file The Python interpreter has a number of functions and types built into it that are always available. They are listed here in alphabetical order. Built-in Funct…
方法一: 1.Excel导出主要代码: try { var bytes: ByteArray = new ByteArray(); bytes.writeMultiByte(DataGridExporter.exportSCV(dataGrid),"cn-gb"); var fr:FileReference = new FileReference(); var date:Date = new Date(); var dateTime:String =…
