Development mode

Developing an application in Taipy often requires changing the configuration multiple times. Data from a previous run are incompatible with the configuration changes. They should then be deleted to try the new configuration version.

In development mode, Taipy automatically deletes old entities attached to a previous development version before running the application. This ensures a fresh start for the application. When running an application in development mode, a development version is created.

In the following, we consider the basic Taipy Core application main.py:

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import taipy.core as tp
from taipy import Config


def my_print_algo(entry: str):
    # does nothing!
    return entry


input_cfg = Config.configure_data_node("input", default_data="a_string")
output_cfg = Config.configure_data_node("output")
task_cfg = Config.configure_task("my_print_algo", my_print_algo, input_cfg, output_cfg)
scenario_cfg = Config.configure_scenario_from_tasks("my_scenario", [task_cfg])

if __name__ == "__main__":
    tp.Core().run()
    tp.create_scenario(scenario_cfg)
    print(f"nb scenarios: {len(tp.get_scenarios())}")

By default, a Taipy Core application runs in development mode, but you can also run a Taipy application on your command line interface with --development or -dev option.

$ python main.py -l
Version number                         Mode                   Creation date
9b01399c-67e4-41a4-83d3-121f7210d4e7   Development (latest)   2023-01-23 23:44:04

$ python main.py
[2023-01-24 23:46:29,468][Taipy][INFO] Development mode: Clean all entities of version 9b01399c-67e4-41a4-83d3-121f7210d4e7
[2023-01-24 23:46:29,615][Taipy][INFO] job JOB_my_print_algo_9d75018a-1803-4358-8530-e62641e00ed8 is completed.
nb scenarios: 1

$ python main.py -l
Version number                         Mode                   Creation date
9b01399c-67e4-41a4-83d3-121f7210d4e7   Development (latest)   2023-01-23 23:46:29

In the example above, python main.py command runs the application in development mode.

The output on the console indicates that all entities of the development version 9b01399c-67e4-41a4-83d3-121f7210d4e7 are deleted before running the application.

Taipy Core application in Notebook environment.

In a Notebook environment, development mode is applied by default when the run method of the Core service is called.

This means all entities of the development version are cleaned every time Core().run() is invoked in a code cell.