Traceback (most recent call last):
  File "main1.py", line 11, in <module>
    ctx = cl.create_some_context()
  File "/usr/lib/python3.6/site-packages/pyopencl/__init__.py", line 591, in create_some_context
    platforms = get_platforms()
  File "/usr/lib/python3.6/site-packages/pyopencl/cffi_cl.py", line 672, in get_platforms
    _handle_error(_lib.get_platforms(platforms.ptr, platforms.size))
  File "/usr/lib/python3.6/site-packages/pyopencl/cffi_cl.py", line 645, in _handle_error
    raise e
pyopencl.cffi_cl.LogicError: clGetPlatformIDs failed: <unknown error -1001>