ENH: JsonSchemaExporter can merge schemata and arrayize them

Summary

New utility functions for the Json schema exporter

• merging and arrays
• file properties

Focus

Functionality

Test Environment

Look at the unit tests:

pytest unittests/test_json_schema_exporter.py -k modification

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
  • How do I use the software? Assume "stupid" users.
  • How do I develop or debug the software? Assume novice developers.
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

assigned to @daniel

These functions are really simple and may be chained for production use.

marked the checklist item Reference related issues as completed

marked the checklist item Annotations in code (Gitlab comments) as completed

requested review from @florian

added 1 commit

• 82e7b342 - MAINT: Compatibility with py3.7

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• 96a0ab9f - ENH: Adding earlier exception, which makes debugging easier.

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• 12a77b94 - TEST: get_deep with inheritance
• 6c87e4bf - FIX: get_deep now also takes parents into account.

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• b49696bf - FIX: importance order fixed.

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• f398b5d9 - ENH: Better error message.
• 5dc99c61 - ENH: json schema export now handles file properties.

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marked the checklist item All automated tests pass as completed

changed the description

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• 6bb3323f - DOC: Docstrings.

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marked the checklist item I understand the intent of this MR as completed