Base class for all Glances plugins. Provides decorators for refresh timing, rate computation, min/max/mean tracking, result logging, and input validation. Implements a consistent interface for update(), update_views(), get_export(), and alert threshold handling. The pattern is reusable for any plugin-based monitoring system and demonstrates clean separation of concerns.

Base class for all export modules. Handles configuration loading, field filtering, InfluxDB line protocol normalization, and a common export() interface. The {build_export} and {normalize_for_influxdb} methods are particularly reusable for any system that needs to export structured data to multiple backends.

Provides a secure implementation of subprocess execution (secure_popen) that mitigates shell injection by controlling operator usage. The allow_operators flag and argument validation pattern are directly reusable in any Python application that needs to execute user-influenced commands safely.

Implements a directed acyclic graph (DAG) for plugin dependency resolution. Used to ensure plugins are updated in the correct order based on their dependencies. The DAG class is standalone and can be extracted for any project needing dependency ordering.

Simple Timer and Counter classes for measuring elapsed time and counting iterations. Used extensively for refresh interval management and performance measurement. Self-contained and reusable in any Python project needing precise timing utilities.