查找空行：^[ \t]*$\r\n
查找最后一位是小写字母的8位十六进制数：0x[0-9]{7,7}[a-z]{1,1}
查找至少有一位是小写字母的8位十六进制数：0x(?=[0-9]{0,7}[a-z])[a-z0-9]{8,8}
import re
#查找至少有一位是小写字母的8位十六进制数，并将其修改为大写
def hex_to_upper(hexStr):
listHex = re.findall("0x(?=[0-9]{0,7}[a-z])[a-z0-9]{8,8}", hexStr)
print listHex
newStr = re.sub(r"0x(?=[0-9]{0,7}[a-z])[a-z0-9]{8,8}", "0XLLLLLLLL", hexStr)
for obj in listHex:
print obj, '-----------', obj[2:]
newStr = re.sub(r"0XLLLLLLLL", '0x'+obj[2:].upper(), newStr, 1)
return newStr
if __name__ == '__main__':
a = "oei0x7822CDE2lwnfnsodf0x7822abe2lsdksdf1023900x98de293c988e9we0x98112931ii"
print a
print hex_to_upper(a)