local human agent (#110)

* local human

* Space

parlai/agents/local_human/agents.py

@@ -0,0 +1,27 @@
+# Copyright (c) 2017-present, Facebook, Inc.
+# All rights reserved.
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree. An additional grant
+# of patent rights can be found in the PATENTS file in the same directory.
+"""Agent does gets the local keyboard input in the act() function.
+   Example: python examples/eval_model.py -m local_human -t babi:Task1k:1 -dt valid
+"""
+
+from parlai.core.agents import Agent
+from parlai.core.worlds import display_messages
+
+class LocalHumanAgent(Agent):
+
+    def __init__(self, opt, shared=None):
+        super().__init__(opt)
+        self.id = 'localHuman'
+
+    def observe(self, msg):
+        print(display_messages([msg]))
+
+    def act(self):
+        obs = self.observation
+        reply = {}
+        reply['id'] = self.getID()
+        reply['text'] = input("Enter Your Reply: ")
+        return reply

parlai/core/worlds.py

@@ -61,6 +61,46 @@ def validate(observation):
     else:
         raise RuntimeError('Must return dictionary from act().')
 
+def display_messages(msgs):
+    """Returns a string describing the set of messages provided"""
+    lines = []
+    episode_done = False
+    for index, msg in enumerate(msgs):
+        if msg is None:
+            continue
+        if msg.get('episode_done', False):
+            episode_done = True
+        # Possibly indent the text (for the second speaker, if two).
+        space = ''
+        if len(msgs) == 2 and index == 1:
+            space = '   '
+        if msg.get('reward', None) is not None:
+            lines.append(space + '[reward: {r}]'.format(r=msg['reward']))
+        if msg.get('text', ''):
+            ID = '[' + msg['id'] + ']: ' if 'id' in msg else ''
+            lines.append(space + ID + msg['text'])
+        if msg.get('labels', False):
+            lines.append(space + ('[labels: {}]'.format(
+                        '|'.join(msg['labels']))))
+        if msg.get('label_candidates', False):
+            cand_len = len(msg['label_candidates'])
+            if cand_len <= 10:
+                lines.append(space + ('[cands: {}]'.format(
+                        '|'.join(msg['label_candidates']))))
+            else:
+                # select five label_candidates from the candidate set,
+                # can't slice in because it's a set
+                cand_iter = iter(msg['label_candidates'])
+                display_cands = (next(cand_iter) for _ in range(5))
+                # print those cands plus how many cands remain
+                lines.append(space + ('[cands: {}{}]'.format(
+                        '|'.join(display_cands),
+                        '| ...and {} more'.format(cand_len - 5)
+                        )))
+    if episode_done:
+        lines.append('- - - - - - - - - - - - - - - - - - - - -')
+    return '\n'.join(lines)
+
 
 class World(object):
     """Empty parent providing null definitions of API functions for Worlds.
@@ -91,40 +131,7 @@ def display(self):
         By default, display the messages between the agents."""
         if not hasattr(self, 'acts'):
             return ''
-        lines = []
-        for index, msg in enumerate(self.acts):
-            if msg is None:
-                continue
-            # Possibly indent the text (for the second speaker, if two).
-            space = ''
-            if len(self.acts) == 2 and index == 1:
-                space = '   '
-            if msg.get('reward', None) is not None:
-                lines.append(space + '[reward: {r}]'.format(r=msg['reward']))
-            if msg.get('text', ''):
-                ID = '[' + msg['id'] + ']: ' if 'id' in msg else ''
-                lines.append(space + ID + msg['text'])
-            if msg.get('labels', False):
-                lines.append(space + ('[labels: {}]'.format(
-                            '|'.join(msg['labels']))))
-            if msg.get('label_candidates', False):
-                cand_len = len(msg['label_candidates'])
-                if cand_len <= 10:
-                    lines.append(space + ('[cands: {}]'.format(
-                            '|'.join(msg['label_candidates']))))
-                else:
-                    # select five label_candidates from the candidate set,
-                    # can't slice in because it's a set
-                    cand_iter = iter(msg['label_candidates'])
-                    display_cands = (next(cand_iter) for _ in range(5))
-                    # print those cands plus how many cands remain
-                    lines.append(space + ('[cands: {}{}]'.format(
-                            '|'.join(display_cands),
-                            '| ...and {} more'.format(cand_len - 5)
-                            )))
-        if self.episode_done():
-            lines.append('- - - - - - - - - - - - - - - - - - - - -')
-        return '\n'.join(lines)
+        return display_messages(self.acts)
 
     def episode_done(self):
         """Whether the episode is done or not. """