SnmpKit v0.3.3 Release Notes

Release Date: 2024-12-19
Version: 0.3.3
Git Tag: v0.3.3

🐛 Bug Fixes

Livebook Variable Scope Fix

This patch release fixes a critical issue in the interactive Livebook tour where variable scope was not properly managed across cells.

Issue Fixed

  • Variable undefined error: cable_modem_target and router_target variables were not accessible in subsequent cells
  • Cell execution failures: Users experienced runtime errors when running cells sequentially
  • Poor user experience: Broken examples interrupted the learning flow

Solution Implemented

  • Explicit variable definitions: Added target definitions at the start of each relevant cell
  • Consistent variable names: Ensured cable_modem_target = "127.0.0.1:1161" and router_target = "127.0.0.1:1162" are available
  • Cell independence: Each cell now works independently without relying on previous cell state
  • Improved reliability: All code examples now execute successfully in any order

Files Modified

  • livebooks/snmpkit_tour.livemd - Fixed variable scope across all cells

🔧 Technical Details

Variable Scope Pattern

Each cell that uses device targets now includes:

# Set targets for this cell
cable_modem_target = "127.0.0.1:1161"
router_target = "127.0.0.1:1162"

This ensures:

  • Reliability - Cells execute successfully regardless of execution order
  • Clarity - Variables are explicitly defined where used
  • Maintainability - Easy to understand and modify
  • User Experience - No unexpected variable errors

Quality Assurance

  • ✅ All cells tested individually
  • ✅ Sequential execution verified
  • ✅ Variable definitions consistent
  • ✅ No breaking changes to functionality

🚀 Upgrade Instructions

# Update your dependency
{:snmpkit, "~> 0.3.3"}

Migration: No code changes required for library usage. This only affects the Livebook tour experience.

📊 Impact

Before (v0.3.2)

  • ❌ Variable scope errors in Livebook
  • ❌ Cells failed when run out of order
  • ❌ Poor learning experience
  • ❌ Runtime errors interrupted tutorial flow

After (v0.3.3)

  • ✅ All cells execute independently
  • ✅ Clear variable definitions in each cell
  • ✅ Smooth learning experience
  • ✅ Reliable tutorial execution

🎯 What's Next

This patch ensures the Livebook tour provides a seamless educational experience. Future releases will focus on:

  • Additional device simulation examples
  • Enhanced MIB compilation tutorials
  • Performance optimization guides
  • Integration examples with monitoring platforms

Previous Release: v0.3.2 - Self-Contained Livebook Tour

Critical patch for optimal Livebook experience!

For questions or support, please visit the GitHub repository.