def semex_add(ctx, args):
"""
Adds a semex to the context's list of semexes.
Args:
ctx (context.Context)
args (kct.argparse.Namepsace)
args.name (str) - used to refer to the semex
args.semex-str (str) - the semex in string form. A valid argument to
semex.parser.compile_regex
Returns: None
"""
from vinge.semex.parser import compile_regex, RegexParseException
from vinge.semex.ast_to_semex import ast_to_semex
name = args.name
# argparse gives us an array of strings as the semex-str. We want a string
semex_str = ' '.join(getattr(args, 'semex-str'))
try:
semex_ast = compile_regex(semex_str)
semex = ast_to_semex(ctx.graph, ctx.transition, ctx.transition_op, semex_ast)
# Add to the context
ctx.add_semex(name, semex)
pp('Successfully added path set')
except RegexParseException, rpe:
error("Error parsing path set (semex) '%s': %s"%(semex_str, rpe.message))
def node_info(ctx, args):
"""
Args:
ctx (context.Context)
args (kct.argparse.Namespace)
args.node-ref
"""
node_ref_str = getattr(args, 'node-ref')
# info command without anything is 'current'
if node_ref_str is None:
node_ref_str = 'cur'
node_ref = parse_node_ref(node_ref_str)
if node_ref is None:
# TODO(trevor) print node-ref types in help msg
error("Error %s is not a valid node-ref" % node_ref_str)
return
try:
node = ctx.node_by_node_ref(node_ref)
_print_location(ctx, node)
_print_semexes_header(ctx)
_print_neighbors(ctx, node)
except ValueError, ve: # Catch invalid node-ref
error(ve)
return
def semex_toggle(ctx, args):
"""
Swaps the active status of the provided semex. Active semexes are used in
various display commands (see e.g. cmd.node_info).
Args:
ctx (context.Context)
args (kct.argparse.Namepsace)
args.name (str) - used to refer to the semex
Returns: None
"""
name = args.name
try:
is_active = not ctx.semex_toggle_active(name)
info("%s is now %s" % (name, _bool_to_active[is_active]))
except KeyError, ke:
# TODO(trevor) catching keyerror here is bad. Probs masking something
error("Unknown path set '%s'" % name)
def semex_peek(ctx, args):
name = args.name
node_ref_str = getattr(args, 'node-ref')
node_ref = parse_node_ref(node_ref_str)
if node_ref is None:
error("Error %s is not a valid node-ref" % node_ref_str)
return
node = ctx.node_by_node_ref(node_ref)
active_semex = ctx.semexes().get(name)
if active_semex is None:
error("Error unknown path set '%s'" % name)
semex = active_semex.semex
new_semex = make_semex_starting_here(ctx.transition, ctx.transition_op,
ctx.graph, ctx.graph_number_of_nodes(),
semex, node)
most_likely = most_likely_endpoints(new_semex, ctx.graph_number_of_nodes())
for (idx, val) in most_likely:
endpoint = ctx.graph.nodes()[idx]
pp("%s [%e]" % (str(endpoint)[:80], val))
