code: 
  import denga.augment as au
  import pandas as pd
  
  class Genda():
  
  	def __init__(self,filepath):  
  		self.filepath = filepath
  		self.dataset = None
  		try:
  			self.dataset = pd.read_csv(self.filepath, header= None, error_bad_lines=False)
  		except:
  			raise Exception("ERROR: File Missing") 
  		self.data = None
  
  	def generate(self):
  		self.data = au.nlp(self.dataset)
  
  	def save(self,filename="genda.txt"):
  		if(self.data is None):
  			raise Exception("ERROR: New Dataset not yet generated.")
  
  		if not "." in filename:
  			raise Exception("ERROR: extension missing from file name.")
  		elif filename.endswith(".csv"):
  			df = pd.DataFrame(self.data, columns=["New Sentences"])
  			df.to_csv(filename, index=False)
  		elif filename.endswith(".txt"):
  			with open(filename, "w") as output:
  				for line in self.data:
  					output.write(str(line)+"\n")
  		else:
  			raise Exception("ERROR: file type not supported use .txt or .csv file name.") 	
apis: pandas.read_csv pandas.DataFrame