Python

The recommended way of developing against HDX is to use the HDX Python API. This is a mature library that supports Python 2.7 and 3 with tests that have a high level of code coverage. The major goal of the library is to make pushing and pulling data from HDX as simple as possible for the end user. There are several ways this is achieved. It provides a simple interface that communicates with HDX using the CKAN Python API, a thin wrapper around the CKAN REST API. The HDX objects, such as datasets and resources, are represented by Python classes. This should make the learning curve gentle and enable users to quickly get started with using HDX programmatically. For example, to read a dataset and get its resources, you would simply do:

from hdx.hdx_configuration import Configuration 
from hdx.data.dataset import Dataset
Configuration.create(hdx_site='prod', user_agent='A_Quick_Example', hdx_read_only=True)'
dataset = Dataset.read_from_hdx('novel-coronavirus-2019-ncov-cases')
resources = dataset.get_resources()

There is library API-level documentation available online.
If you intend to push data to HDX, then it may be helpful to start with this scraper template which shows what needs to be done to create datasets on HDX. It should be straightforward to adapt the template for your needs.