* [python] Add checker pd attr param and fix switch example
* Correct submit self.param to java gateway
* Fix missing parameter for switch example
* Add mechanism checker before submit to java gateway
close: #7803
* Fix mock get task code and version
* Change judge statement and add comment
* [python] Task condition missing two downstream param
We add two downstream tasks to set task condition
success and failed node
close: #7763
* Add getter and setter property condition_resulth in base task
* Make sure all file with `.py` extension and all file
end with "_example"
* Make sure all examples have `__doc__`
* Make sure not have duplicate process definition name
* Make sure process definition same as filename
close: #7729
After #7505 merged. we could use condition task type
but our dependent set in the wrong direction, all
the condition operators should be upstream of the
current task instead of downstream
fix: #7649
* [python] Fix task relation wrong hashable function
Currently our :class:`TaskRelation` have wrong __hash__
function, would mistake a object as same object. It failed
our dependence and process definition. this patch fix it
by adding `_KEY_ATTR` to overwrite TaskRelation's __eq__
and correct __hash__ func
close: #7627
* Fix code format
Cause procedure parameter name need `method` instead of `sql`
we change it's name. And remove parameter `sql` from parent
class `Database`
closes: #7386
* Change class Base `to_dict` to `get_define` for more clearer
* Remove class TaskParams and sub class make code easy to
understand and avoid task implement cycle dependence
* Remove class ObjectJsonBase in Task to reduce complexity
fix: #7271
* [python] add subProcess task
* refactor python gateway server and task for subprocess
* add function comment for getProcessDefinition
* change process_definition usage of Subprocess task
* [ci] Add coverage check in CI
* Coverage add dependent
* Install pydolphinscheduler before run coverage
* Up test coverage to 87% and down threshold to 85%
* Fix code style
* Add doc about coverage
* [python] Add parameter schedule for process definition
* Rebase and fix some code style
* May schedule work on both string and datetime
* Fix flaky test
* Add comment about freeze time
* Add edge test for schedule_json with None schedule
* Fix test function name
* Fix rebase error
* [python] Add code style lint for GA
* Change github action name
* Auto change by black
* Fix flake8
* Fix broken link for pyds README.md
* Auto fix by black
* Separate GitHub workflows
* Add Black badge and CI locally in README.md
* Add CI for python API
* Fix task assign without process definition
* Fix ci
* Add header
* Add build badge for pydolphinscheduler
* Add content to README.md
* Remove unnecessary blank line
Jiajie Zhong
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