docstr: control: rear wheel drive
  
  Args:
      gas (float): How much gas gets applied. Gets clipped between 0 and 1.
docstr_tok: ["control",":","rear","wheel","drive","Args",":","gas","(","float",")",":","How","much","gas","gets","applied",".","Gets","clipped","between","0","and","1","."]
code: def gas(self, gas):
      """control: rear wheel drive
  
      Args:
          gas (float): How much gas gets applied. Gets clipped between 0 and 1.
      """
      gas = np.clip(gas, 0, 1)
      for w in self.wheels[2:4]:
          diff = gas - w.gas
          if diff > 0.1:
              diff = 0.1  # gradually increase, but stop immediately
          w.gas += diff
  
file_path: gym/gym/envs/box2d/car_dynamics.py
imports: import math
  import Box2D
  import numpy
  from gym.error import DependencyNotInstalled
label_desc: Use image node_id 2 for calling the Car obj's underlying member method code with example usage: obj.gas(gas) without return types