old_contents: class PxLoadBar(object):
      """
      Visualizes system load in a horizontal bar.
  
      Inputs are:
      * System load
      * Number of physical cores
      * Number of logical cores
      * How many columns wide the horizontal bar should be
  
      The output is a horizontal bar string.
  
      Load below the number of physical cores is visualized in green.
  
      Load between the number of physical cores and logical cores is visualized in
      yellow.
  
      Load above of the number of logical cores is visualized in red.
  
      As long as load is below the number of physical cores, it will use only the
      first half of the output string.
  
      Load up to twice the number of physical cores will go up to the end of the
      string.
      """
  
      def __init__(self, physical=None, logical=None):
          if physical is None or physical < 1:
              raise ValueError("Physical must be a positive integer")
  
          if logical is None or logical < physical:
              raise ValueError("Logical must be a positive integer >= physical (%r)" % physical)
  
          self._physical = physical
          self._logical = logical
  
          CSI = b"\x1b["
          self.normal = CSI + b"m"
          self.inverse = CSI + b"7m"
          self.red = CSI + b"41m"
          self.yellow = CSI + b"43m"
          self.green = CSI + b"42m"
  
      def _get_colored_bytes(self, load=None, columns=None):
          "Yields pairs, with each pair containing a color and a byte"
          for i in range(columns):
              yield (self.normal, b' ')
  
      def get_bar(self, load=None, columns=None):
          if load is None:
              raise ValueError("Missing required parameter load=")
  
          if columns is None:
              raise ValueError("Missing required parameter columns=")
  
          return_me = b''
          color = None
          for color_and_byte in self._get_colored_bytes(load=load, columns=columns):
              if color_and_byte[0] != color:
                  return_me += color_and_byte[0]
                  color = color_and_byte[0]
              return_me += color_and_byte[1]
  
          if color != self.normal:
              return_me += self.normal
  
          return return_me
  
new_contents: class PxLoadBar(object):
      """
      Visualizes system load in a horizontal bar.
  
      Inputs are:
      * System load
      * Number of physical cores
      * Number of logical cores
      * How many columns wide the horizontal bar should be
  
      The output is a horizontal bar string.
  
      Load below the number of physical cores is visualized in green.
  
      Load between the number of physical cores and logical cores is visualized in
      yellow.
  
      Load above of the number of logical cores is visualized in red.
  
      As long as load is below the number of physical cores, it will use only the
      first half of the output string.
  
      Load up to twice the number of physical cores will go up to the end of the
      string.
      """
  
      def __init__(self, physical=None, logical=None):
          if physical is None or physical < 1:
              raise ValueError("Physical must be a positive integer")
  
          if logical is None or logical < physical:
              raise ValueError("Logical must be a positive integer >= physical (%r)" % physical)
  
          self._physical = physical
          self._logical = logical
  
          CSI = b"\x1b["
          self.normal = CSI + b"m"
          self.inverse = CSI + b"7m"
          self.red = CSI + b"41m"
          self.yellow = CSI + b"43m"
          self.green = CSI + b"42m"
  
      def _get_colored_bytes(self, load=None, columns=None):
          "Yields pairs, with each pair containing a color and a byte"
  
          # FIXME: Set these properly
          inverse_start = 0.0
          yellow_start = 0.0
          red_start = 0.0
          normal_start = 0.0
  
          for i in range(columns):
              # We always start out green
              color = self.green
  
              if i >= red_start:
                  color = self.red
              if i >= yellow_start:
                  color = self.yellow
              if i >= inverse_start:
                  color = self.inverse
              if i >= normal_start:
                  color = self.normal
  
              yield (color, b' ')
  
      def get_bar(self, load=None, columns=None):
          if load is None:
              raise ValueError("Missing required parameter load=")
  
          if columns is None:
              raise ValueError("Missing required parameter columns=")
  
          return_me = b''
          color = self.normal
          for color_and_byte in self._get_colored_bytes(load=load, columns=columns):
              if color_and_byte[0] != color:
                  return_me += color_and_byte[0]
                  color = color_and_byte[0]
              return_me += color_and_byte[1]
  
          if color != self.normal:
              return_me += self.normal
  
          return return_me
  
subject: Add more required code