cannot import name 'launch' about pyppeteer HOT 7 CLOSED

D:\xxx\pyppeteer\tests>python test.py
[W:pyppeteer.chromium_downloader] start chromium download.
Download may take a few minutes.
[W:pyppeteer.chromium_downloader] chromium download done.
[W:pyppeteer.chromium_downloader] chromium extracted to: C:\Users\xxx\.pyppeteer\local-chromium\497674
Traceback (most recent call last):
  File "test.py", line 15, in <module>
    asyncio.get_event_loop().run_until_complete(main())
  File "C:\Python36\lib\asyncio\base_events.py", line 467, in run_until_complete
    return future.result()
  File "test.py", line 13, in main
    await browser.close()
  File "C:\Python36\lib\site-packages\pyppeteer\browser.py", line 34, in close
    asyncio.get_event_loop().run_until_complete(self._connection.dispose())
  File "C:\Python36\lib\asyncio\base_events.py", line 454, in run_until_complete
    self.run_forever()
  File "C:\Python36\lib\asyncio\base_events.py", line 408, in run_forever
    raise RuntimeError('This event loop is already running')
RuntimeError: This event loop is already running
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "C:\Python36\lib\shutil.py", line 387, in _rmtree_unsafe
    os.unlink(fullname)
PermissionError: [WinError 5] Access is denied: 'C:\\Users\\xxx\\.pyppeteer\\.dev_profile\\tmpcml6o4ff\\CrashpadMetrics-active.pma'

> python pyppeteer.py
Traceback (most recent call last):
  File "pyppeteer.py", line 6, in <module>
    from pyppeteer.launcher import launch
  File "D:\xxx\xxx\test\pyppeteer.py", line 6, in <module>
    from pyppeteer.launcher import launch
ModuleNotFoundError: No module named 'pyppeteer.launcher'; 'pyppeteer' is not a package

  asyncio.get_event_loop().run_until_complete(main())
  File "/usr/local/Cellar/python3/3.6.3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/asyncio/base_events.py", line 467, in run_until_complete
    return future.result()
  File "pet.py", line 9, in main
    await browser.close()
  File "/usr/local/scrapy/lib/python3.6/site-packages/pyppeteer/browser.py", line 34, in close
    asyncio.get_event_loop().run_until_complete(self._connection.dispose())
  File "/usr/local/Cellar/python3/3.6.3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/asyncio/base_events.py", line 454, in run_until_complete
    self.run_forever()
  File "/usr/local/Cellar/python3/3.6.3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/asyncio/base_events.py", line 408, in run_forever
    raise RuntimeError('This event loop is already running')
RuntimeError: This event loop is already running

sudo python3.6 -m pip install -U git+https://github.com/miyakogi/pyppeteer.git@dev