This error can be fixed by running these two commands:

$ sudo pip install --upgrade pip 

$ sudo apt-get --reinstall install python-pyasn1 python-pyasn1-modules

With response:
Traceback (most recent call last):
 File "/usr/local/bin/aws", line 19, in <module>
 import awscli.clidriver
 File "/usr/local/lib/python2.7/dist-packages/awscli/", line 17, in <module>
 import botocore.session
 File "/usr/local/lib/python2.7/dist-packages/botocore/", line 25, in <module>
 import botocore.configloader
 File "/usr/local/lib/python2.7/dist-packages/botocore/", line 18, in <module>
 from six.moves import configparser
ImportError: No module named six.moves
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