Port as many examples as possible

Directories to port:
- [x] benchmarks
- [ ] computer_vision
- [x] financial
- [ ] getting_started
- [x] graphics
- [x] helloworld
- [ ] image_processing
- [ ] lin_algebra
- [ ] machine_learning

Start by comparing the completed directories—benchmarks, financial, graphics, and helloworld—with the unchecked computer_vision, getting_started, image_processing, lin_algebra, and machine_learning directories. Determine which examples are missing from the Python bindings and port the remaining feasible examples; done means the unchecked directory work is completed and the examples run successfully.

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