Description of problem:

I'm using python-boto library in scripts to communicate with Amazon Web Services and since the Fedora 14 they have stopped working. The simple commands included in python-boto, e.g. list_instances fail as well. All returning same error:

$ list_instances 
ID                   Groups                         Hostname
Traceback (most recent call last):
  File "/usr/bin/list_instances", line 6, in <module>
    for r in ec2.get_all_instances():
  File "/usr/lib/python2.7/site-packages/boto/ec2/connection.py", line 378, in get_all_instances
    return self.get_list('DescribeInstances', params, [('item', Reservation)])
  File "/usr/lib/python2.7/site-packages/boto/connection.py", line 615, in get_list
    raise self.ResponseError(response.status, response.reason, body)
boto.exception.EC2ResponseError: EC2ResponseError: 403 Forbidden
<?xml version="1.0" encoding="UTF-8"?>
<Response><Errors><Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.</Message></Error></Errors><RequestID>xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</RequestID></Response>

Version-Release number of selected component (if applicable):

python-2.7-8.fc14.1.x86_64
python-boto-1.9b-4.fc14.noarch (one year old stable version)
python-crypto-2.3-2.fc14.1.x86_64

Steps to Reproduce:
1. install python-boto
2. create a configuration in ~/.boto with your credentials in this format:
[Credentials]
aws_access_key_id=XXXXXXXXXXXXXXXXXXXX
aws_secret_access_key=YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY

3. execute $ /usr/bin/list_instances
  
Actual results:

All requests fails due to wrong signature.

Expected results:

Everything works and latest python-boto-2.x is part of Fedora.

Additional info:

There is problem with python-boto library and latest python-2.7, there isn't check for this python release in /usr/lib/python2.7/site-packages/boto/connection.py:

@@ -240,7 +240,7 @@ class AWSAuthConnection:
             # in the Host header and so we needed to make sure we
             # did the same when calculating the V2 signature.  In 2.6
             # it no longer does that.  Hence, this kludge.
-            if sys.version[:3] == "2.6" and port == 443:
+            if sys.version[:3] in ("2.6","2.7") and port == 443:
                 signature_host = self.host
             else:
                 signature_host = '%s:%d' % (self.host, port)