[Python] No module named 'gym' 해결방법

(py37) parkgyeongtae-2:1_cartpole-v1-example pgt0409$ python 0_cartpole-v1-example.py 
Traceback (most recent call last):
  File "0_cartpole-v1-example.py", line 1, in <module>
    import gym
ModuleNotFoundError: No module named 'gym'

 

pip install gym