Dictionary as my naive graph db

my_graph_db.py

# This is a sample Python script.

# Eng Eryx


my_graph_db = dict({'n': 0})


def insert(item):
    n = my_graph_db['n'] + 1
    item['id'] = n
    my_graph_db[n] = item
    my_graph_db['n'] = n


def delete(item=None, key=0):
    if item is not None:
        my_graph_db.pop(item['id'])
    if key != 0:
        my_graph_db.pop(key)


def test_run():
    # Add some transactions to my dict
    insert({'id': 0, 'amount': 1000, 'type': 'debit', 'date': '20210906T21:54:00'})
    trans_2 = {'id': 0, 'amount': 1000, 'type': 'debit', 'date': '20210906T21:54:00'}
    insert(trans_2)
    insert({'id': 0, 'amount': 1000, 'type': 'debit', 'date': '20210906T21:54:00'})
    insert({'id': 0, 'amount': 1000, 'type': 'debit', 'date': '20210906T21:54:00'})

    print(my_graph_db)


# Press the green button in the gutter to run the script.
if __name__ == '__main__':
    test_run()

# See PyCharm help at https://www.jetbrains.com/help/pycharm/