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Speech recognition extension library

Project description

Dragonfly offers a powerful Python interface to speech recognition and a high-level language object model to easily create and use voice commands. Dragonfly supports following speech recognition engines:

  • Dragon NaturallySpeaking (DNS), a product of Nuance
  • Windows Speech Recognition (WSR), included with Microsoft Windows Vista and freely available for Windows XP

Basic example

A very simple example of Dragonfly usage is to create a static voice command with a callback that will be called when the command is spoken. This is done as follows:

from dragonfly.all import Grammar, CompoundRule

# Voice command rule combining spoken form and recognition processing.
class ExampleRule(CompoundRule):
    spec = "do something computer"                  # Spoken form of command.
    def _process_recognition(self, node, extras):   # Callback when command is spoken.
        print "Voice command spoken."

# Create a grammar which contains and loads the command rule.
grammar = Grammar("example grammar")                # Create a grammar to contain the command rule.
grammar.add_rule(ExampleRule())                     # Add the command rule to the grammar.
grammar.load()                                      # Load the grammar.

The example above is very basic and doesn’t show any of Dragonfly’s exciting features, such as dynamic speech elements. To learn more about these, please take a look at the project’s documentation here.

Project details


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