diff options
Diffstat (limited to 'prolog')
| -rw-r--r-- | prolog/engine.py | 43 |
1 files changed, 20 insertions, 23 deletions
diff --git a/prolog/engine.py b/prolog/engine.py index 50582c8..eca0826 100644 --- a/prolog/engine.py +++ b/prolog/engine.py @@ -6,7 +6,6 @@ import http.client import json from operator import itemgetter import re -import socket import time import urllib @@ -112,46 +111,45 @@ def pretty_vars(data): result += [strip_html(b) for b in data['residuals']] return ',\n'.join(result) if result else 'true' -# Run [query] in the pengine with id [engine] and return the list of answers -# found within [timeout] seconds. If a timeout occurs before the query is done, -# 'timed out' is appended as the last answer. -def ask_all(engine, query, timeout=10): - # Returns a tuple ((bindings, constraints), error, more?) for one answer. +# Run [query] in pengine with ID [engine] and check whether all solutions +# specified by [answers] (a list of binding dictionaries) are returned. This +# function succeeds if [query] finds each solution in [answers] at least once +# within [timeout] seconds, and fails when it finds any other solution. +def check_answers(engine, query, answers, timeout=10): + seen = [] start = time.monotonic() - answers, messages = [], [] try: # Run the query. reply, output = ask(engine, query, timeout) - messages += output - if 'error' in map(itemgetter(0), output): - return answers, messages answer, error, more = process_answer(reply) if answer: - answers.append(answer) - if error: - messages.append(error) + bindings, constraints = answer + if bindings not in answers: + return False + if bindings not in seen: + seen.append(bindings) # Continue while there are more potential answers and time remaining. while more: real_timeout = timeout - (time.monotonic()-start) if real_timeout <= 0: - raise socket.timeout() + break reply, output = next(engine, timeout=real_timeout) - messages += output answer, error, more = process_answer(reply) if answer: - answers.append(answer) - if error: - messages.append(error) - except socket.timeout as ex: - answers.append('timed out') - return answers, messages + bindings, constraints = answer + if bindings not in answers: + return False + if bindings not in seen: + seen.append(bindings) + except: + pass + return len(seen) == len(answers) # Run [query] in the pengine with id [engine] and return the first answer only # found within [timeout] seconds. # used for quick hint debugging by Sasha def ask_one(engine, query, timeout=1): - # quicker than ask_all as there could be many hint-triggering tests # Returns either an error message, true, false, timeout (see below), or bindings # Timeout is "returned" as an unhandled exception -- deliberately so @@ -175,7 +173,6 @@ def ask_one(engine, query, timeout=1): return 'false' def ask_truth(engine, query, timeout=1): - # quicker than ask_all as there could be many hint-triggering tests # Returns either True or False # (Runtime) error is False! # Timeout is an unhandled exception -- deliberately so |