old_contents: """Various utility functions, mostly dealing with input/output"""
  
  import os
  
  import numpy as np
  
  def load_snapshots(directory_name, stack_coords=False):
      """Loads files by traversing a directory and reading in a filename sorted order"""
      data = []
      for root, dirs, files in os.walk(directory_name):
          for file_name in sorted(files, key=lambda x: int(x.split(".")[-2])):
              #This needs fixing, but I'll leave it like this until we unify our formats
              if file_name.endswith("csv"):
                  bodies = np.loadtxt(os.path.join(root, file_name), delimiter=",", skiprows=1, unpack=stack_coords)
                  data.append(bodies)
  
      return np.array(data)
      
  def save_snapshot(snapshot, file_name):
      f = open(file_name, 'w')
      f.write("x,y,z\n")
      for i in range(snapshot.shape[0]):
          f.write("%e,%e,%e\n" % (snapshot[i, 0], snapshot[i, 1], snapshot[i, 2]))
      f.close()
  
  def construct_snapshot_name(directory, num):
      return os.path.join(directory, "nbody_snapshot." + str(num) + ".csv")
new_contents: """Various utility functions, mostly dealing with input/output"""
  
  import os
  
  import numpy as np
  
  def load_snapshots(directory_name, stack_coords=False):
      """Loads files by traversing a directory and reading in a filename sorted order"""
      data = []
      for root, dirs, files in os.walk(directory_name):
          for file_name in sorted(files, key=lambda x: int(x.split(".")[-2])):
              #This needs fixing, but I'll leave it like this until we unify our formats
              if file_name.endswith("csv"):
                  bodies = np.loadtxt(os.path.join(root, file_name), delimiter=",", unpack=stack_coords)
                  data.append(bodies)
  
      return np.array(data)
      
  def save_snapshot(snapshot, file_name):
      np.savetxt(file_name, snapshot, delimiter=",")
  
  def construct_snapshot_name(directory, num):
      return os.path.join(directory, "nbody_snapshot." + str(num) + ".csv")
subject: Fix csv saving for arbitrary parameter sets