broken pip

gistfile1.txt

$ aws s3 ls
Traceback (most recent call last):
  File "/usr/local/bin/aws", line 19, in <module>
    import awscli.clidriver
  File "/Library/Python/2.7/site-packages/awscli/clidriver.py", line 17, in <module>
    import botocore.session
  File "/Library/Python/2.7/site-packages/botocore/session.py", line 26, in <module>
    import botocore.credentials
  File "/Library/Python/2.7/site-packages/botocore/credentials.py", line 22, in <module>
    from dateutil.parser import parse
  File "/Library/Python/2.7/site-packages/dateutil/parser.py", line 43, in <module>
    from . import tz
  File "/Library/Python/2.7/site-packages/dateutil/tz/__init__.py", line 1, in <module>
    from .tz import *
  File "/Library/Python/2.7/site-packages/dateutil/tz/tz.py", line 23, in <module>
    from ._common import tzname_in_python2, _tzinfo, _total_seconds
  File "/Library/Python/2.7/site-packages/dateutil/tz/_common.py", line 2, in <module>
    from six.moves import _thread
ImportError: cannot import name _thread