s3cmd ImportError: No module named S3.Exceptions

Received an error after installing and trying to run s3cmd 1.0.0

s3cmd -h

Problem: ImportError: No module named S3.Exceptions
S3cmd:   unknown version. Module import problem?

Traceback (most recent call last):
  File "/usr/bin/s3cmd", line 1995, in <module>
    from S3.Exceptions import *
ImportError: No module named S3.Exceptions

Your sys.path contains these entries:

This error came about after upgrading to the latest Amazon Linux distro 2015.03.0

Answer

Looks like the error happened because python2.7 is now the default python version in the Amazon Linux 2015.03.0+ If you change python back to 2.6 and run s3cmd it should work without a problem

update-alternatives --set python /usr/bin/python2.6
s3cmd -h

After the s3cmd command is ran you can put python back to 2.7 for yum and other utilities:

update-alternatives --set python /usr/bin/python2.7
yum install <package>