에러가 떠요 ㅜㅜ

import pytube

yt = pytube.YouTube("https://www.youtube.com/watch?v=WH7xsW5Os10") #다운받을 동영상 URL 지정

vids= yt.streams.all()

print('vids',vids)

에러가 

Traceback (most recent call last):
  File "C:\section2\youtube-downloader.py", line 1, in <module>

    import pytube
  File "C:\Users\FS15020201\Anaconda3\envs\section2\lib\site-packages\pytube\__init__.py", line 13, in <module>
    from pytube.streams import Stream
  File "C:\Users\FS15020201\Anaconda3\envs\section2\lib\site-packages\pytube\streams.py", line 62
    self.is_otf: bool = stream["is_otf"]
               ^
SyntaxError: invalid syntax



분명 pytube 가 설치되어 있습니다. 
버전 10.7.2