Initial chatbot I/O proof of concept (prateekiiest#115)

* Initial chatbot I/O proof of concept

* Fix PEP-8 issues in chatbot

* Fix another PEP-8 issue

* Remove backup file and unnecessary pyaudio dependency

Author: adeen-s

Code-Sleep-Python/chatbot/code.py

@@ -0,0 +1,38 @@
+import speech_recognition as sr
+import os
+import subprocess
+from gtts import gTTS
+
+r = sr.Recognizer()
+
+with sr.Microphone() as source:
+    r.adjust_for_ambient_noise(source)
+    print("Say something!")
+    audio = r.listen(source)
+    print("Got the speech. Now processing...")
+
+# recognize speech using Wit.ai
+# export your wit.ai key to your environment before running this program
+WIT_AI_KEY = os.getenv("WITAIKEY")
+if not WIT_AI_KEY:
+    print("API key not available")
+    exit()
+
+in_speech = ""
+try:
+    in_speech = r.recognize_wit(audio, key=WIT_AI_KEY)
+    print("You said " + in_speech)
+except sr.UnknownValueError:
+    print("Wit.ai could not understand audio")
+except sr.RequestError as e:
+    print("Could not request results from Wit.ai service; {0}".format(e))
+
+# in_speech contains the string of the input audio.
+# It can be processed and actions can be performed based on it.
+# TODO implement actions based on keywords
+# Suggestions: Utilise wit.ai for proper NLP
+
+if (in_speech):
+    tts = gTTS(text=in_speech, lang="en")
+    tts.save("sample.mp3")
+    subprocess.Popen(["mpg123", "-q", "sample.mp3"]).wait()

Code-Sleep-Python/chatbot/requirements.txt

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+gTTS==2.0.0
+gTTS-token==1.1.1
+SpeechRecognition==3.8.1
+