pysnmp-sync-adapter

Lightweight Synchronous Adapter for PySNMP AsyncIO HLAPI

This package provides lightweight, blocking wrappers around the pysnmp.hlapi.v1arch.asyncio and pysnmp.hlapi.v3arch.asyncio modules of PySNMP, enabling synchronous use of the SNMP high-level API in PySNMP v7+ without requiring direct asyncio management. It preserves the flexibility of PySNMP’s asyncio-based architecture and includes a compatibility layer for various legacy interfaces. The two additional functions parallel_get_sync and cluster_varbinds enable efficient, high-performance concurrent SNMP queries in a blocking context.

Features

• Drop-in synchronous alternatives to PySNMP's async-HLAPI: get_cmd_sync, next_cmd_sync, set_cmd_sync, bulk_cmd_sync, walk_cmd_sync, bulk_walk_cmd_sync.
• Supports both v1arch and v3arch PySNMP v7+ architectures, automatically selected or configurable via the PYSNMP_ARCH environment variable.
• Supports both IPv4 and IPv6 transport targets via UdpTransportTarget and Udp6TransportTarget.
• Reuses or creates the default shared event loop (asyncio.get_event_loop()), ensuring integration efficiency.
• Sync wrappers accept an optional timeout parameter (in seconds) that limits the total execution time using asyncio.wait_for().
• Minimizes connection overhead by reusing pre-created transport instances when calling create_transport().
• The add-on parallel_get_sync function executes multiple SNMP GET requests concurrently in a blocking context. It is complemented by cluster_varbinds, an ancillary utility that normalizes and clusters OIDs into ordered chunks for efficient batching. Together, they enable high-throughput querying of large OID sets without requiring asyncio, reducing per-PDU overhead while preserving request order.
• In addition, through the pysnmp_sync_adapter.legacy_wrappers compatibility layer, it supports:
  • the Python SNMP library v5.0.24 HLAPI
  • the etingof/pysnmp v5 HLAPI
• Also, through the pysnmp_sync_adapter.cmdgen_wrappers compatibility layer, it runs code written against the cmdgen SNMP library appearing in pysnmp.entity.rfc3413.oneliner.

These adapters allow to call the familiar HLAPI functions in a purely synchronous style (e.g. in scripts, GUIs like Tkinter, or blocking contexts) without having to manage asyncio directly. This restores the synchronous experience familiar from earlier PySNMP versions. Native sync HLAPI wrappers were deprecated in recent releases in favor of asyncio.

Provided Methods

Full information and usage details at the pysnmp-sync-adapter GitHub repository.