<filename>TestData.py
class TestData:
    block = {
        'block_id': None,
        'block_hash': None,
        'prev_hash': None,
        'transactions': {
            'tx1': None
        }
    }

<filename>TestData.py
class TestData:
    block = {
        'block_id': None,
        'block_hash': None,
        'prev_hash': None,
        'transactions': {
            'tx1': None
        }
    }
