Entrypoint for the chatbot

entry.py

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+# Description : Entry point for Simple Question Answer Chatbot
+# Program Argument :
+#		datasetName = "Name of dataset text file" eg. "USB.txt"
+# Usage :
+#		$ python entry.py dataset/USB
+
+print("Bot> Please wait, while I am loading my dependencies")
+
+from Retrieval_TFIDF import Retrieval_TFIDF as DRM
+from processed_question import ProcessedQuestion as PQ
+import re
+import sys
+
+
+if len(sys.argv) == 1:
+	print("Bot> I need some reference to answer your question")
+	print("Bot> Please! Rerun me using following syntax")
+	print("\t\t$ python3 P2.py <datasetName>")
+	print("Bot> You can find dataset name in \"dataset\" folder")
+	print("Bot> Thanks! Bye")
+	exit()
+
+datasetName = sys.argv[1]
+# Loading Dataset
+try:
+	datasetFile = open(datasetName,"r")
+except FileNotFoundError:
+	print("Bot> Oops! I am unable to locate \"" + datasetName + "\"")
+	exit()
+
+# Retrieving paragraphs : Assumption is that each paragraph in dataset is
+# separated by new line character
+paragraphs = []
+for para in datasetFile.readlines():
+	if(len(para.strip()) > 0):
+		paragraphs.append(para.strip())
+
+# Processing Paragraphs
+drm = DRM(paragraphs,True,True)
+
+print("Bot> Hey! I am ready. Ask me factoid based questions only :P")
+print("Bot> You can say me Bye anytime you want")
+
+# Greet Pattern
+greetPattern = re.compile("^\ *((hi+)|((good\ )?morning|evening|afternoon)|(he((llo)|y+)))\ *$",re.IGNORECASE)
+
+isActive = True
+while isActive:
+	userQuery = input("You> ")
+	if(not len(userQuery)>0):
+		print("Bot> You need to ask something")
+
+	elif greetPattern.findall(userQuery):
+		response = "Hello!"
+	elif userQuery.strip().lower() == "bye":
+		response = "Bye Bye!"
+		isActive = False
+	else:
+		# Proocess Question
+		pq = PQ(userQuery,True,False,True)
+
+		# Get Response From Bot
+		response =drm.query(pq)
+	print("Bot>",response)