from nonclassified import NonClassified
from classified import Classified

import csv

def main():
while True:
   filename = input("Enter filename: ")
   try:
         with open(filename) as csvfile:
            print("")
            classified = []
            nonclassified = []
            nonearthquakes = []
            reader = csv.DictReader(csvfile)
            for row in reader:
               time = row["time"]
               if row["latitude"] == "":
                     latitude = None
               else:
                     latitude = float(row["latitude"])
               if row["longitude"] == "":
                     longitude = None
               else:
                     longitude = float(row["longitude"])
               if row["mag"] == "":
                     magnitude = None
               else:
                     magnitude = float(row["mag"])
               id = row["id"]
               place = row["place"]
               type = row["type"]
               if type == "earthquake":
                     if magnitude == None or magnitude < 3:
                        nonclassified.append(NonClassified(time, latitude,
                                             longitude, magnitude, id, place))
                     else:
                        classified.append(Classified(time, latitude,
                                          longitude, magnitude, id, place))
               else:
                     nonearthquakes.append(type)
         print("Number of Classified Earthquakes: " + str(len(classified)))
         print("Number of Nonclassified Earthquakes: " + str(len(nonclassified)))
         print("Number of Non-Earthquakes: " + str(len(nonearthquakes)))
         classified_dictionary = {"Minor": [], "Light

Create in your source _files directory, create a python file inner_...