python 字符串转16进制数字

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1 原始文件中的字符串

2 读取文件字符串

从文件中读取2个字节，代码如下：

def print_hex_str(str1): print len(str1) print str1 print int(str1, 16) for i in str1: print “——–“ print(‘%#X’ % ord(i)) print(‘%d’ % ord(i))

def des_ecb_decrypt_from_file(srcfile, dstfile, key): fsrc = open(srcfile, ‘rb’) if not fsrc: print “fsrc open failed!” fdst = open(dstfile, ‘wb’) if not fdst:

print “fdst open failed!”

datalen = fsrc.read(2) print type(datalen) print len(datalen)

print_hex_str(datalen)

3 运行程序报错

4 对字符串进行binascii转换

5 字符串转为整型正常

原字符串为：0X000X58

转换后的字符串为：0058

6 binascii分析

binascii.b2a_hex(data) 字符串转16进制字符串binascii.hexlify(data)¶

Return the hexadecimal representation of the binary data. Every byte of data is converted into the corresponding 2-digit hex representation. The resulting string is therefore twice as long as the length of data.

官方网址：https://docs.python.org/2/library/binascii.html

7 参考资料

(1) https://blog.csdn.net/penny_hardaway/article/details/45046643

(2) https://www.cnblogs.com/LarryGen/p/5088144.html

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