old_contents: #!/usr/bin/env python
  
  import numpy as np
  import matplotlib
  matplotlib.use("Agg")
  import matplotlib.pyplot as plt
  import matplotlib.animation as animation
  import sys
  import utils
  
  def render_frame(num, data, line):
      xyz_file = open(files[num])
      
      _x = []
      _y = []
  
      for xyz in xyz_file:   
          _x.append(float(xyz.split()[0]))
          _y.append(float(xyz.split()[1]))
  
      line.set_data(_x, _y)
      xyz_file.close()
  
      return line,
  
  # Simulation Path
  path = sys.argv[1]
  output_name = sys.argv[2] if len(sys.argv) >= 2 else 'result.mp4'
  files = utils.get_all_files(path, "*.xyz")
  size_files = len(files)
  
  # Set up formatting for the movie files
  Writer = animation.writers['ffmpeg']
  writer = Writer(fps=25, bitrate=1800)
  
  fig1 = plt.figure()
  
  data = []
  l, = plt.plot([], [], 'ro')
  
  plt.xlim(0, 1)
  plt.ylim(0, 1)
  plt.xlabel('x')
  plt.title('Simulation Result')
  
  line_ani = animation.FuncAnimation(fig1, render_frame, size_files, fargs=(data, l),
                                     interval=50, blit=True)
  
  line_ani.save(output_name, writer=writer)
  
new_contents: #!/usr/bin/env python
  
  import numpy as np
  import matplotlib
  matplotlib.use("Agg")
  import matplotlib.pyplot as plt
  import matplotlib.animation as animation
  import sys
  import utils
  
  def render_frame(num, data, line):
      xyz_file = open(files[num])
      
      _x = []
      _y = []
  
      for xyz in xyz_file:   
          _x.append(float(xyz.split()[0]))
          _y.append(float(xyz.split()[1]))
  
      line.set_data(_x, _y)
      xyz_file.close()
  
      return line,
  
  # Simulation Path
  path = sys.argv[1]
  output_name = sys.argv[2] if len(sys.argv) > 2 else 'result.mp4'
  files = utils.get_all_files(path, "*.xyz")
  size_files = len(files)
  
  # Set up formatting for the movie files
  Writer = animation.writers['ffmpeg']
  writer = Writer(fps=25, bitrate=1800)
  
  fig1 = plt.figure()
  
  data = []
  l, = plt.plot([], [], 'ro')
  
  plt.xlim(0, 1)
  plt.ylim(0, 1)
  plt.xlabel('x')
  plt.title('Simulation Result')
  
  line_ani = animation.FuncAnimation(fig1, render_frame, size_files, fargs=(data, l),
                                     interval=50, blit=True)
  
  line_ani.save(output_name, writer=writer)
  
subject: Fix error in argv interpretation. (#102)