run2-complete-itinerary-solution

name	run2_complete_itinerary_solution
description	End-to-end solution for building multi-city travel itineraries with pet-friendly accommodations and diverse cuisine constraints.

Complete Multi-City Travel Itinerary Solution

Problem Overview

Build a 7-day itinerary for 2 travelers:

• Route: Minneapolis → 3 Ohio cities → Minneapolis
• Dates: March 17-23, 2022
• Budget: $5,100
• Constraints: Pet-friendly, no flights, diverse cuisines (American, Italian, Chinese, Mediterranean)

Key Implementation Decisions

1. Route Optimization

Selected: Minneapolis → Cleveland → Columbus → Cincinnati → Minneapolis

• Natural geographic progression
• Minimizes backtracking
• Balanced city-by-city exploration time

2. Time Allocation

• Day 1: Travel to Cleveland + evening activities
• Days 2-3: Full Cleveland exploration (2 nights)
• Day 4: Travel to Columbus + evening activities
• Day 5: Full Columbus exploration (1 night)
• Day 6: Travel to Cincinnati + evening activities
• Day 7: Cincinnati departure (1 night)

3. Cuisine Distribution Strategy

Map cuisines across 7 days:

Day 1: American (breakfast/lunch) + Italian (dinner)
Day 2: Italian + Mediterranean + Chinese
Day 3: Chinese + American + Mediterranean
Day 4: Mediterranean + Italian + American
Day 5: American + Chinese + Italian
Day 6: Italian + Chinese + American
Day 7: Chinese + American + depart

Ensures all 4 cuisines appear multiple times, no same cuisine twice same day.

4. Data Quality Filtering

Restaurant Selection Criteria:

• Valid ASCII names (≥60% ASCII characters)
• City match
• Cuisine match (using primary + alias terms)
• Rating ≥ 3.7
• Cost $0-250
• Avoid duplicates within a city during itinerary
• Sort by rating as tiebreaker

Pet-Friendly Accommodation Filter:

• NOT containing "No pets" in house_rules
• Price range: $0-250/night
• City match
• Prefer "Entire home/apt" over private rooms
• Sort by review rating

Attraction Selection:

• Drop duplicates by name
• Get top 3 per city
• Sort alphabetically for consistency
• Format with trailing semicolon

5. Implementation Pattern

# Structure for each day
day = {
    "day": int,
    "current_city": str,  # "City" or "from A to B"
    "transportation": str,  # Include direction
    "breakfast": str,  # "Name, City"
    "lunch": str,
    "dinner": str,  # or "-" if skipping
    "attraction": "A;B;C;",  # Must end with ;
    "accommodation": str  # Must mention pet-friendly
}

6. Common Pitfalls to Avoid

1. Unicode Characters: Filter restaurants with non-ASCII names
2. Duplicate Restaurants: Track used restaurants per city
3. Over-Budget: Filter accommodations strictly for price
4. Wrong Cuisine: Use multi-strategy matching (exact + aliases)
5. Missing Data: Have fallback accommodation/attraction names
6. Format Issues: Always end attraction strings with semicolon

7. Budget Verification

Example breakdown for $5,100 budget:

• 6 nights × $120 = $720 (accommodations)
• 7 days × $80 = $560 (meals)
• Attractions: $300
• Gas (~1,000 miles): $200
• Buffer: $3,220 (comes out to ~$460/day for other expenses)

Actual itinerary stays well within this budget using real data.

Code Structure

# 1. Load and clean datasets
# 2. Define validation functions for restaurant/accommodation quality
# 3. Create journey/cuisine schedule mappings
# 4. For each day:
#    - Determine cities and meal cities
#    - Get restaurants matching cuisine
#    - Avoid duplicates using tracking set
#    - Get pet-friendly accommodation
#    - Get attractions list
# 5. Build JSON with all 7 days
# 6. Write to output file

Testing Checklist

• 7 days in plan
• Each day has all 8 required fields
• No flights (only Self-driving)
• All accommodations mention pet-friendly
• Attractions end with semicolon
• All 4 cuisines appear in itinerary
• No restaurant repeated in same city on consecutive days
• All cities from dataset (verified in citySet_with_states.txt)
• Meals have restaurant names (not just cuisine names)
• Valid JSON output
• Data sources array populated correctly

Performance Notes

• Loading 9,500+ restaurant records may take 2-3 seconds
• Filtering operations are O(n) on dataset size
• Deduplication adds minimal overhead
• Total script execution: < 5 seconds typical

Lessons Learned

1. Raw data quality matters - must filter for ASCII/valid names
2. Fuzzy matching on cuisines needed (not all exact matches available)
3. Pet-friendly filter is critical - "No pets" terminology varies
4. Accommodation data may have listings from multiple cities/years
5. Always have fallback values for accommodations and attractions
6. Track used restaurants per city to avoid repetition
7. Price filtering must be strict to stay within budget