pyTransition : Errors in sample code

[tibobliss]

Two errors cause issues when running the sample code for request_accessibility_map:

• lat/long are inverted
• there is a trailing comma at the end of the parameters

[greenscientist]

Also, those code example should be included in the README from external file so that we can CI test them.

[tibobliss]

Another one. In the two samples for connecting to the server, the get_nodes() function is used as an example. It is called in two different ways: transition_instance.get_nodes() and Transition.get_nodes()

The first one gives the following error:

HTTPError: 500 Server Error: Internal Server Error for url: https://stmplanif.transition.city/api/v1/nodes (see issue #990), which means it actually manages to create a query.

While the second one gives the following error:

TypeError: Transition.get_nodes() missing 1 required positional argument: 'self'

So it seems that the first formulation should be used in all sample code.

[greenscientist]

#1171 add a method to link actual script to the README to ease in testing.
Some fixes were applied

[greenscientist]

the trailling comma is not an issue in Python, but the other errors were fixed