code: def _initialize_render_dictionary(self):
          
  
          self._rendered = dict()
  
          # Iterate over all weeks
          for week in range(1, self.duration + 1):
              self._rendered[week] = dict()
  
              # Iterate over all days
              for day in self.days:
                  self._rendered[week][day] = dict()
  
                  # Iterate over all main exercises
                  for dynamic_ex in day.dynamic_exercises:
                      self._rendered[week][day][dynamic_ex] = dict()
docs: Initialize a dictionary for rendered values.
      
      
          Examples
          -------
          >>> program = Program('My training program')
          >>> program._initialize_render_dictionary()
          >>> program._rendered is False
          False