old_contents: from numpy import int16
  
  FORMATS = {
      'int16': int16,
      'float': float
  }
  
  
  class Data(object):
  
      def __init__(self, rdd):
          self.rdd = rdd
  
      def first(self):
          return self.rdd.first()
  
      def collet(self):
          return self.rdd.collect()
  
      def count(self):
          return self.rdd.count()
  
      def mean(self):
          return self.rdd.values().mean()
  
      def sum(self):
          return self.rdd.values().sum()
  
      def variance(self):
          return self.rdd.values().variance()
  
      def stdev(self):
          return self.rdd.values().stdev()
  
      def stats(self):
          return self.rdd.values().stats()
  
      def cache(self):
          self.rdd.cache()
  
new_contents: from numpy import int16
  
  FORMATS = {
      'int16': int16,
      'float': float
  }
  
  
  class Data(object):
  
      def __init__(self, rdd):
          self.rdd = rdd
  
      def first(self):
          return self.rdd.first()
  
      def collect(self):
          return self.rdd.collect()
  
      def count(self):
          return self.rdd.count()
  
      def mean(self):
          return self.rdd.values().mean()
  
      def sum(self):
          return self.rdd.values().sum()
  
      def variance(self):
          return self.rdd.values().variance()
  
      def stdev(self):
          return self.rdd.values().stdev()
  
      def stats(self):
          return self.rdd.values().stats()
  
      def cache(self):
          self.rdd.cache()
  
subject: fix typo in Data.collect method name