Add fake_bot example.

examples/fake_bot.py

@@ -0,0 +1,61 @@
+from kadot.bot_engine import Agent
+from kadot.models import CRFExtractor
+import random
+
+# Set up an extractor to retrieve place names in queries.
+places_extractor = CRFExtractor({
+    "For eg. at Suite 101, Johnshon Avenue in London.": ('Suite', '101', 'Johnshon', 'Avenue,', 'London'),
+    "The soldiers clashed at Gettysburg.": ('Gettysburg',),
+    "The treaty was signed at Versailles.": ('Versailles',),
+    "Give me the forecast in New York !": ('New', 'York'),
+    "I am on Brompton Road": ('Brompton', 'Road',),
+    "The plane stops at Dallas on the way to San Francisco ": ('Dallas', 'San', 'Francisco'),
+    "Yesterday, I went to Dublin.": ('Dublin',)
+    },
+    crf_filename='.crf_city_extractor_city'
+)
+
+bot = Agent()
+bot.add_entity('place', places_extractor)
+
+
+@bot.intent([
+    'hi',
+    'hello !',
+    'goodbye',
+    'bye bye',
+    'ok',
+    'thanks'
+])
+def smalltalk(raw, context):
+    """
+    An intent to answer to greetings and appreciations.
+    Answer the same with an exclamation mark (!).
+    """
+    return raw + '!', context
+
+
+@bot.intent([
+    "What is the weather like in Paris ?",
+    "What kind of weather will it do in London ?"
+    "Give me the weather forecast for Berlin please.",
+    "Tell me the forecast in New York !",
+    "Give me the weather in San Francisco...",
+    "I want the forecast in Dublin."
+], entities=['place'])
+def weather(raw, context):
+    """
+    Say the weather for a given place (random ;p).
+    """
+
+    if context['place']:
+        answer = "In {}, it will be {}".format(context['place'], random.choice(['sunny', 'cloudy', 'rainy']))
+        return answer, context
+    else:
+        return bot.prompt("In which city ?", key='place', callback=weather, context=context)
+
+
+bot.train()
+
+while True:
+    print(bot.predict(text=input('> ')))