By default, dumps () and dump () create pickles using a printable ASCII representation. 缺省情况下,dumps()和dump()使用可打印的ASCII表示来创建pickle。
As being the differences of the Internet network equipment, direct transmission of the eight binary data flow with Simple Mail Transfer Protocol can be unreliable sometimes, and it is needed to adopt an encoding method to convert the eight binary data flow into the printable ASCII characters. 由于Internet网络设备的差异,使用基本邮件协议直接传输8位二进制数据流有时是不可靠的,需要采用某种编码方法将8位二进制流转换为可打印的ASCⅡ码字符。