About update decord from 0.5.2 to 0.6.0

Hi, I meet an error After I update my decord from 0.5.2 to 0.6.0 using pip. After the update, the pip will not be used.
Traceback (most recent call last):
File "./pip", line 5, in
from pip._internal.cli.main import main
ModuleNotFoundError: No module named 'pip._internal.cli'

Start with the pip executable and the reported import from pip._internal.cli.main, then reproduce an upgrade from decord 0.5.2 to 0.6.0 using pip. Determine why pip can no longer be imported after the update; done means the upgrade completes and pip runs normally afterward.

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