tts not working in kubuntu 18.04

[Sahil-pixel]

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Python 3.6.9 (default, Jul 17 2020, 12:50:27) [GCC 8.4.0] on linux Type "help", "copyright", "credits" or "license" for more information.

from plyer import tts tts.speak('hello') Traceback (most recent call last): File "", line 1, in File "/home/sahil/.local/lib/python3.6/site-packages/plyer/facades/tts.py", line 34, in speak self._speak(message=message) File "/home/sahil/.local/lib/python3.6/site-packages/plyer/facades/tts.py", line 39, in _speak raise NotImplementedError() NotImplementedError