Schema Definitions Are Not Deterministically Ordered

[dagrooms52]

Background
I am generating a Flask server from a Swagger document with multiple schema definitions. I am generating the server code at build time, and committing it in source control.

Actual Outcome
Between two builds with no changes in my swagger.yaml, the file schemas.py moves a Definitions... entry between two different lines in the file; it is either the first Definitions entry, or the third. This is seen in the diff:

$ git diff
-DefinitionsWeirdType = {'type': 'object', 'blah': 'blah'}  # Hops from here..
DefinitionsOkType = {'type': 'object', 'blah': 'blah'}
DefinitionsFineType = {'type': 'object', 'blah': 'blah'}
+DefinitionsWeirdType = {'type': 'object', 'blah': 'blah'}  # To here

Expected Outcome
The file should not change between two builds. The Definitions variables should be sorted in a deterministic manner.

Versions

Python 3.6.5
swagger-py-codegen==0.3.2
swagger: "2.0"

Additional Details
I can work around this for now by only running my swagger-py-codegen task if changes are detected in my swagger.yaml.

[foodszhang]

@dagrooms52 Could you provide your swagger.yaml or a yaml that can stably reproduce this problem?