nltk.chat.util module

class nltk.chat.util.Chat

Bases: object

__init__(pairs, reflections={})

Initialize the chatbot. Pairs is a list of patterns and responses. Each pattern is a regular expression matching the user’s statement or question, e.g. r’I like (.*)’. For each such pattern a list of possible responses is given, e.g. [‘Why do you like %1’, ‘Did you ever dislike %1’]. Material which is matched by parenthesized sections of the patterns (e.g. .*) is mapped to the numbered positions in the responses, e.g. %1.

Parameters

• pairs (list of tuple) – The patterns and responses

• reflections (dict) – A mapping between first and second person expressions

Return type

None

converse(quit='quit')

respond(str)

Generate a response to the user input.

Parameters

str (str) – The string to be mapped

Return type

str