import xcb
import xcb.xproto

def atom(conn, name):
    """Return an atom given its name"""
    name_bytes = list(ord(c) for c in name)
    voidcookie = conn.core.InternAtom(False, len(name_bytes), name_bytes)
    reply = voidcookie.reply()
    return reply.atom

def atom_name(conn, atom):
    voidcookie = conn.core.GetAtomName(atom)
    reply = voidcookie.reply()
    name = "".join(chr(byte) for byte in reply.name)
    return name

conn = xcb.connect()
root_window = conn.get_setup().roots[0].root
XA_ATOM = atom(conn, "ATOM")
XA_NET_SUPPORTED = atom(conn, "_NET_SUPPORTED")

# Get the _NET_SUPPORTED property
voidcookie = conn.core.GetProperty(
    False,              # delete
    root_window,        # window
    XA_NET_SUPPORTED,   # property
    XA_ATOM,            # type
    0,                  # long_offset
    65535)              # long_length
reply = voidcookie.reply()

print "root_window = %d (0x%x)" % (root_window, root_window)
print "XA_ATOM = %d (0x%x)" % (XA_ATOM, XA_ATOM)
print "XA_NET_SUPPORTED = %d (0x%x)" % (XA_NET_SUPPORTED, XA_NET_SUPPORTED)
print "reply.format = %r" % (reply.format,)
print "reply.type = %r (%r)" % (reply.type, atom_name(conn, reply.type))
print "reply.bytes_after = %r" % (reply.bytes_after,)
print "reply.value_len = %r" % (reply.value_len,)
print "len(reply.value) = %r" % (len(reply.value),)
print "reply.value = %r" % (list(reply.value),)