On Sat, 2005-02-05 at 12:02, Steve Holden wrote: > Pedro Werneck wrote: > > The problem is that '\x00' is a escape sequence... > > Try something like this: > >>>>x = '\x00' > >>>>int(repr(x)[3:-1], 16) > > 0 > >>>>x = '\x15' > >>>>int(repr(x)[3:-1], 16) > > 21 > > On Sat, 05 Feb 2005 06:51:32 -0700 > > Earl Eiland <[EMAIL PROTECTED]> wrote: > >>I'm trying to process the IP packet length field, as recorded by pcap > >>(Ethereal) and recovered using pcapy. When I slice out those bytes, I > >>get a value that shows in '\x00' format, rather than '0x00'. Neither > >>int() nor eval() are working. How do I handle this? > >>Earl Eiland > Talk about making things difficult! > >>> x = '\x00' > >>> ord(x) > 0 > >>> x = '\x15' > >>> ord(x) > 21 > >>>
Ethereal's emission of \x00 shouldn't make your life any more difficult. The conversion of \0xx takes place in the eval. If you store the string \x00 in a file and call open.read or command.getoutput, you will get the python string "\\x00". Stuff you read from a file arrives un-de-escaped. The solution is simple. mystring.replace( "\x","0x" ) Adam DePrince -- http://mail.python.org/mailman/listinfo/python-list
