output.txt

python .\aws\test_templateIteration.py
Outputs:
  Output0:
    Description: Output0
    Value: Output0
  Output1:
    Description: Output1
    Value: Output1
  Output2:
    Description: Output2
    Value: Output2
Resources: {}

Parameters:
  Parameter0:
    Default: 'Coming from: Output0'
    Type: AWS::EC2::VPC::Id
  Parameter1:
    Default: 'Coming from: Output1'
    Type: AWS::EC2::VPC::Id
  Parameter2:
    Default: 'Coming from: Output2'
    Type: AWS::EC2::VPC::Id
Resources: {}

.
----------------------------------------------------------------------
Ran 1 test in 0.013s

OK

test_templateIteration.py

import unittest

from troposphere import Output, Parameter, Template


class TestTemplIteration(unittest.TestCase):

    def testTemplateIteration(self):

        providerTempl = Template()
        num_outputs = 3
        for i in range(num_outputs):
            o = Output("Output{!s}".format(i),
                Description="Output{!s}".format(i),
                Value="Output{!s}".format(i))
            providerTempl.add_output(o)
        self.assertEqual(num_outputs, len(providerTempl.outputs))
        print(providerTempl.to_yaml())

        consumerTempl = Template()
        for i, key in enumerate(providerTempl.outputs):
            origin = key # providerTempl.outputs[i]
            param = p = Parameter(
                "Parameter{}".format(i),
                Type="AWS::EC2::VPC::Id",
                Default="Coming from: {!s}".format(providerTempl.outputs[key].title))
            consumerTempl.add_parameter(p)
        self.assertEqual(len(consumerTempl.parameters), len(providerTempl.outputs))
        print(consumerTempl.to_yaml())

if __name__ == '__main__':
    unittest.main()