tests/runners/airflow/liminal/write_inputs/write_inputs.py

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import json
import os

inputs_dir = '/mnt/vol1/inputs/'

num_files = int(os.environ['NUM_FILES'])
num_splits = int(os.environ['NUM_SPLITS'])

# create input files - split by round robin
for i in range(0, num_files):
    split_id = i % num_splits
    split_dir = os.path.join(inputs_dir, str(split_id))

    if not os.path.exists(split_dir):
        os.makedirs(split_dir)

    filename = os.path.join(split_dir, f'input{i}.json')
    with open(filename, 'w') as f:
        print(f'Writing input file {filename}')
        f.write(json.dumps({'mykey': f'myval{i}'}))