old_contents: #!/usr/bin/env python
  SECONDS = 40
  DELTA_T = 0.1
  STEPS = int(SECONDS / DELTA_T)
  K_V = 0.90
  K_W = 0.90
  
new_contents: #!/usr/bin/env python
  DELTA_T = 0.1
  SIMULATION_TIME_IN_SECONDS = 40
  STEPS = int(SIMULATION_TIME_IN_SECONDS / DELTA_T)
  K_V = 0.90
  K_W = 0.90
  
subject: Rename constant