python将字符串转成16进制的ASCii码的值

binascii.a2b_hex(hexstr)
binascii.unhexlify(hexstr)
Return the binary data represented by the hexadecimal string hexstr. This function is the inverse of b2a_hex(). hexstr must contain an even number of hexadecimal digits (which can be upper or lower case), otherwise a TypeError is raised.

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>>> a= "x00x91xe2xbexf1x00x04xc4x94xbaxf7xa2x11xf7x11fxe4Ax1cxcc­"  >>> import binascii  >>> binascii.b2a_hex(a)  "0091e2bef10004c494baf7a211f71166e4411ccc"  >>> str1 = "fadsfasf" >>> print binascii.b2a_hex(str1) "6661647366617366"

来源：http://www.dreamrunner.org/2011/11/convert-between-binary-and-ascii/