After the purchase of RI's the script starts throwing the following error.

ec2-costs us-east-1
/Users/pbeam/github/ec2-cost-tools/ec2_costs/main.py:24: Warning: Click detected the use of the unicode_literals future import. This is heavily discouraged because it can introduce subtle bugs in your code. You should instead use explicit u"" literals for your unicode strings. For more information see http://click.pocoo.org/python3/
def main(region, show_expirations=False):
Traceback (most recent call last):
File "/Users/pbeam/github/ec2-cost-tools/venv/bin/ec2-costs", line 9, in
load_entry_point('ec2-costs==0.1.0', 'console_scripts', 'ec2-costs')()
File "/Users/pbeam/github/ec2-cost-tools/venv/lib/python2.7/site-packages/click/core.py", line 700, in call
return self.main(_args, *_kwargs)
File "/Users/pbeam/github/ec2-cost-tools/venv/lib/python2.7/site-packages/click/core.py", line 680, in main
rv = self.invoke(ctx)
File "/Users/pbeam/github/ec2-cost-tools/venv/lib/python2.7/site-packages/click/core.py", line 873, in invoke
return ctx.invoke(self.callback, *_ctx.params)
File "/Users/pbeam/github/ec2-cost-tools/venv/lib/python2.7/site-packages/click/core.py", line 508, in invoke
return callback(_args, **kwargs)
File "/Users/pbeam/github/ec2-cost-tools/ec2_costs/main.py", line 43, in main
result = get_reserved_analysis(conn)
File "/Users/pbeam/github/ec2-cost-tools/ec2_costs/init.py", line 143, in get_reserved_analysis
covered_price = matched.recurring_charges[0].amount
IndexError: list index out of range