mahmoud/boltons

Features

• Specialized Data Structures - Ships advanced implementations of priority queues, immutable mappings, and recursive data transformers.
• Immutable Maps - Implements frozen dictionaries that prevent the modification of keys and values after creation.
• Recursive Data Explorers - Provides utilities to traverse nested data structures and apply transformation functions based on custom entry rules.
• Recursive Data Transformers - Traverses and modifies nested dictionaries and lists to reshape complex data structures using custom mapping rules.
• CLI Development Helpers - Provides a suite of helpers for rendering progress bars, escaping shell arguments, and prompting users in the terminal.
• Network Reliability - Implements exponential backoff and socket buffering to ensure stable connections and complete message delivery.
• File System Operations - Provides utilities for atomic file writes, recursive directory searches, and shell path expansions.
• System Utility Helpers - Provides low-level system helpers for atomic file saving, path expansion, and network socket buffering.
• Python Tooling - Acts as a comprehensive utility toolkit providing reusable recipes for common Python programming tasks.
• Standard Library Extensions - Extends the Python standard library with reusable recipes and specialized utilities while maintaining zero external dependencies.
• Lazy Dataset Iterators - Implements memory-efficient processing of large datasets using sliding windows, chunking, and flattening.
• Nested Data Transformers - Provides recursive traversal tools to map and transform elements within nested data structures using custom rules.
• Recursive Data Remapping - Traverses nested data structures to transform or merge values recursively based on defined rules.
• Zero-Dependency Libraries - Ensures maximum portability by implementing all features using only the Python standard library with zero external dependencies.
• Command-Line Interface Development - Provides a toolkit for building terminal applications with progress bars, user prompts, and safe shell argument formatting.
• Dictionary Indexes - Provides a utility to create sub-dictionaries as indexes over a dataset to speed up lookups.
• Multi-Value Dictionaries - Provides a data structure that allows multiple values for a single key while preserving insertion order.
• Shell Argument Escapers - Provides a utility to escape and combine command line arguments into a single string safe for shell execution.
• Traceback Filters - Implements traceback folding to collapse repeated frames and reduce noise in recursive call stacks.
• Traceback Structurers - Transforms raw system stack traces into structured objects to facilitate error analysis and recursive call noise reduction.
• Sliding Window Algorithms - Implements a sliding-window iterator to produce overlapping groups of elements from a sequence.
• Iterable Flatteners - Provides a utility to collapse nested sequences or iterators into a single flat stream of elements.
• Key Filtering - Provides a utility to extract a new dictionary containing only a specified subset of keys from an original mapping.
• Non-Overwriting Updates - Ships a utility to merge key-value pairs into a dictionary only if the keys do not already exist.
• Atomic File Writes - Provides atomic file write operations that use temporary files to prevent data corruption during crashes.
• Traceback Parsing - Transforms raw traceback strings into structured objects for easier analysis and serialization.
• Disk-Memory Thresholds - Implements a system to store data in memory and spill to disk automatically when a size threshold is exceeded.
• LRU Cache Eviction - Implements a least-recently-used (LRU) eviction policy to maintain a fixed-size memory pool.
• Priority Queues - Provides a priority queue implementation where the highest priority item is processed first.
• Stack Trace Formatters - Represents traceback information as structured types to improve error reporting and debugging.
• Terminal Progress Indicators - Implements a visual progress bar for the terminal to track the completion status of long-running tasks.
• CLI Confirmation Prompts - Implements a terminal utility to ask yes/no questions and capture user responses to validate specific actions.
• State-Based Invalidation - Uses a dirty-bit mechanism to automatically invalidate cached property values when an object's state changes.
• General Utilities - Collection of over 250 useful constructs and utility snippets.

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