east-py-std

Standard platform functions for the East programming language in Python.

Python equivalent of @elaraai/east-node - provides platform functions for console I/O, filesystem, HTTP, crypto, time, path manipulation, and random number generation.

Installation

pip install east-py-std

Quick Start

import asyncio
from east.runtime.compiler import compile_async
from east_py_std import python_platform

# Assuming you have East IR from the TypeScript compiler
# compiled_fn = compile_async(ir, python_platform)
# await compiled_fn()

Platform Functions

Console I/O (console_impl)

• console_log(message: String) -> Null - Write to stdout with newline
• console_error(message: String) -> Null - Write to stderr with newline
• console_write(message: String) -> Null - Write to stdout without newline

Cryptography (crypto_impl)

• crypto_random_bytes(length: Integer) -> Blob - Generate cryptographically secure random bytes
• crypto_hash_sha256(data: String) -> String - SHA-256 hash of UTF-8 string (hex)
• crypto_hash_sha256_bytes(data: Blob) -> Blob - SHA-256 hash of binary data
• crypto_uuid() -> String - Generate UUID v4

HTTP Fetch (fetch_impl)

• fetch_get(url: String) -> String - HTTP GET request (async)
• fetch_post(url: String, body: String) -> String - HTTP POST request (async)
• fetch_request(config: FetchRequestConfig) -> FetchResponse - Custom HTTP request (async)

Filesystem (fs_impl)

• fs_read_file(path: String) -> String - Read file as UTF-8 text
• fs_write_file(path: String, content: String) -> Null - Write UTF-8 text to file
• fs_append_file(path: String, content: String) -> Null - Append text to file
• fs_delete_file(path: String) -> Null - Delete file
• fs_exists(path: String) -> Boolean - Check if path exists
• fs_is_file(path: String) -> Boolean - Check if path is a file
• fs_is_directory(path: String) -> Boolean - Check if path is a directory
• fs_create_directory(path: String) -> Null - Create directory (recursive)
• fs_read_directory(path: String) -> Array<String> - List directory contents
• fs_read_file_bytes(path: String) -> Blob - Read file as binary
• fs_write_file_bytes(path: String, content: Blob) -> Null - Write binary to file
• fs_open_beast<T>(path: String) -> T - Open an indexed beast2 Array/Set/Dict file as a frozen, lazily paged value: the file is mapped and one segment is resident at a time (fs_open_beast(platform, T) is the factory behind FileSystem.openBeast)

Path Manipulation (path_impl)

• path_join(segments: Array<String>) -> String - Join path segments
• path_resolve(path: String) -> String - Resolve to absolute path
• path_dirname(path: String) -> String - Get directory name
• path_basename(path: String) -> String - Get base name (filename)
• path_extname(path: String) -> String - Get file extension

Random Numbers (random_impl)

14 random number generation functions using cryptographically secure RNG:

• random_uniform() -> Float - Uniform [0, 1)
• random_normal() -> Float - Standard normal N(0, 1)
• random_range(min: Integer, max: Integer) -> Integer - Uniform integer [min, max]
• random_exponential(lambda: Float) -> Float - Exponential distribution
• random_weibull(k: Float) -> Float - Weibull distribution
• random_bernoulli(p: Float) -> Integer - Bernoulli trial (0 or 1)
• random_binomial(n: Integer, p: Float) -> Integer - Binomial distribution
• random_geometric(p: Float) -> Integer - Geometric distribution
• random_poisson(lambda: Float) -> Integer - Poisson distribution
• random_pareto(alpha: Float) -> Float - Pareto (power law) distribution
• random_log_normal(mu: Float, sigma: Float) -> Float - Log-normal distribution
• random_irwin_hall(n: Integer) -> Float - Sum of n uniform variables
• random_bates(n: Integer) -> Float - Average of n uniform variables
• random_seed(seed: Integer) -> Null - Seed RNG (no-op in Python)

Time (time_impl)

• time_now() -> Integer - Current Unix timestamp in milliseconds (sync)
• time_sleep(ms: Integer) -> Null - Sleep for milliseconds (async)

Usage

Full Platform (Async)

from east_py_std import python_platform
from east.runtime.compiler import compile_async

# Use all platform functions (includes async operations)
compiled_fn = compile_async(ir, python_platform)
await compiled_fn()

Sync-Only Subset

from east_py_std import python_platform_sync
from east.runtime.compiler import compile

# Use only synchronous platform functions
# Excludes: fetch_*, time_sleep
compiled_fn = compile(ir, python_platform_sync)
compiled_fn()

Individual Modules

from east_py_std import console_impl, fs_impl, crypto_impl

# Use specific platform function groups
platform = [*console_impl, *fs_impl, *crypto_impl]
compiled_fn = compile(ir, platform)

Development

# First-time setup (installs dependencies)
make install

# Development workflow
make test          # Run test suite
make lint          # Run linter (ruff)
make format        # Format code
make typecheck     # Type check with mypy
make check         # Run all checks (lint + typecheck + test)

# Other useful commands
make repl          # Start Python REPL with east_py_std loaded
make coverage      # Generate HTML coverage report
make lint-fix      # Auto-fix linting issues
make clean         # Clean build artifacts

Claude Code plugin

The East ecosystem also ships a Claude Code plugin — East language skills, example search, and preemptive diagnostics for East code — installed separately from the elaraai marketplace:

# Inside Claude Code
/plugin marketplace add elaraai/east-workspace
/plugin install east@elaraai

# From a terminal
claude plugin marketplace add elaraai/east-workspace
claude plugin install east@elaraai

License

BSL 1.1 (Business Source License):

• Non-production use (evaluation, testing, development) is free
• Production use by or on behalf of for-profit entities requires a commercial license
• Code becomes AGPL-3.0 four years after each release

See LICENSE.md for full details.

Commercial licensing: support@elara.ai

Ecosystem

• East: Statically typed, expression-based language with serializable IR. Run portable logic across TypeScript, Python, C, and other runtimes.

  • @elaraai/east: Core language SDK with type system, expressions, and reference JS compiler

• East Node: Node.js platform functions for I/O, databases, and system operations.

  • @elaraai/east-node-std: Console, FileSystem, Fetch, Crypto, Time, Path, Random
  • @elaraai/east-node-io: SQLite, PostgreSQL, MySQL, MongoDB, Redis, S3, FTP, SFTP, XLSX, XML, compression
  • @elaraai/east-node-cli: CLI for running East IR programs in Node.js

• East C: C11 native runtime for executing East IR. Distributed via npm (launcher + per-platform optional dependencies) and as tarballs on each GitHub Release.

  • @elaraai/east-c-cli: npm launcher — installs the matching native binary as an optional dependency
  • east-c: Core runtime — type system, IR interpreter, builtins, serialization (Beast2, JSON, CSV, East text)
  • east-c-std: Console, FileSystem, Fetch, Crypto, Time, Path, Random
  • east-c-cli: CLI for running East IR programs natively

• East Python: Python runtime, standard platform, I/O, and data-science platform functions. Published to PyPI.

  • east-py: Core Python runtime — type system, IR compiler, 212+ builtins, Cython-accelerated hot paths
  • east-py-std: Console, FileSystem, Fetch, Crypto, Time, Path, Random
  • east-py-io: SQLite, PostgreSQL, MySQL, MongoDB, Redis, S3, FTP, SFTP, XLSX, XML, compression
  • east-py-cli: CLI for running East IR programs in Python
  • east-py-datascience (PyPI) + @elaraai/east-py-datascience (npm): Optimization (MADS, Optuna, ALNS, GoogleOR), ML (XGBoost, LightGBM, NGBoost, PyTorch, Lightning, GP), Bayesian inference (PyMC), explainability (SHAP), conformal prediction (MAPIE)

• East UI: Typed UI component definitions and React renderer, plus VS Code preview.

  • @elaraai/east-ui: 50+ typed UI components for layouts, forms, charts, tables, dialogs
  • @elaraai/east-ui-components: React renderer with Chakra UI v3 styling
  • @elaraai/e3-ui: e3 + UI bridge — Data bindings, e3.ui() task, manifest
  • @elaraai/e3-ui-components: React Query hooks and preview components for the e3 API
  • east-ui-preview: VS Code extension for live East UI component preview

• e3 — East Execution Engine: Durable execution engine for running East pipelines at scale. Git-like content-addressable storage, automatic memoization, reactive dataflow, real-time monitoring.

  • @elaraai/e3: SDK for authoring e3 packages with typed tasks and pipelines
  • @elaraai/e3-core: Object store, dataflow orchestrator, execution state
  • @elaraai/e3-types: Shared type definitions for e3 packages
  • @elaraai/e3-cli: e3 repo, e3 package, e3 workspace, e3 start, e3 watch, e3 logs commands
  • @elaraai/e3-api-client: HTTP client for remote e3 repositories
  • @elaraai/e3-api-server: REST API server for e3 repositories
  • @elaraai/e3-api-tests: Shared API compliance test suites

Links

• Website: https://elaraai.com/
• East Repository: https://github.com/elaraai/east-workspace/tree/main/libs/east
• Issues: https://github.com/elaraai/east-workspace/issues
• Email: support@elara.ai

About Elara

East is developed by Elara AI Pty Ltd, an AI-powered platform that creates economic digital twins of businesses that optimize performance. Elara combines business objectives, decisions and data to help organizations make data-driven decisions across operations, purchasing, sales and customer engagement, and project and investment planning. East powers the computational layer of Elara solutions, enabling the expression of complex business logic and data in a simple, type-safe and portable language.

Developed by Elara AI Pty Ltd.

Developed by Elara AI Pty Ltd