tessl/pypi-gcloud

Python client library for Google Cloud Platform services including Datastore, Storage, and Pub/Sub

Overall
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93%

Overview

Eval results

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Bank Account Transfer System

Name: tessl/pypi-gcloud
Author: tessl

A bank account transfer system that uses Cloud Datastore transactions to safely transfer money between accounts with automatic rollback on failures.

Capabilities

Account Management

Creating an account with ID "acc1" and initial balance 1000 stores the account in datastore and returns the account balance as 1000 @test

Successful Transfers

Creating two accounts with balances 1000 and 500, then transferring 300 from the first to the second results in final balances of 700 and 800 @test

Transfer Validation

Attempting to transfer 1500 from an account with balance 1000 raises an Exception and leaves both account balances unchanged @test
Attempting to transfer a negative amount -100 raises a ValueError @test

Transaction Rollback

When a transfer encounters an error after debiting the source account but before crediting the destination, the transaction rolls back and both accounts retain their original balances @test

Implementation

@generates

API

def transfer_money(client, from_account_id, to_account_id, amount):
    """
    Transfer money from one account to another using a transaction.

    Args:
        client: A gcloud datastore Client instance
        from_account_id: String ID of the source account
        to_account_id: String ID of the destination account
        amount: Numeric amount to transfer (must be positive)

    Returns:
        dict: Contains 'success' boolean and 'message' string
        Example: {'success': True, 'message': 'Transfer completed'}

    Raises:
        ValueError: If amount is not positive
        Exception: If accounts don't exist or insufficient balance
    """
    pass

def create_account(client, account_id, initial_balance):
    """
    Create a new bank account in the datastore.

    Args:
        client: A gcloud datastore Client instance
        account_id: String ID for the account
        initial_balance: Numeric starting balance

    Returns:
        Key: The datastore Key of the created account
    """
    pass

def get_balance(client, account_id):
    """
    Get the current balance of an account.

    Args:
        client: A gcloud datastore Client instance
        account_id: String ID of the account

    Returns:
        Numeric: Current account balance

    Raises:
        Exception: If account doesn't exist
    """
    pass

Dependencies { .dependencies }

gcloud { .dependency }

Provides Cloud Datastore client for transactional data operations.

@satisfied-by

Install with Tessl CLI

npx tessl i tessl/pypi-gcloud