code: from datetime import datetime
  import pandas as pd
  import numpy as np
  import json
  
  df = pd.read_csv('/home/josh/python/SNLP/src/truncate_data/epoch_rev.json')
  df = df[df.epoch_time < 1483142400.0]
  df = df[df.epoch_time > 1419984000.0]
  with open('epoch_fil.json', 'w+') as f:
      f.write(out)
  
apis: pandas.read_csv