Crossword

Constraint Satisfaction Problem (CSP)

It looks like you're implementing a constraint satisfaction problem (CSP) solver for a crossword puzzle, using techniques like enforcing node consistency, arc consistency (AC-3), and backtracking search. The Variable class represents crossword words with attributes such as starting position, direction (ACROSS or DOWN), and length, while the Crossword class initializes the grid structure from a file, determines valid words from a vocabulary file, and identifies overlapping constraints between words. The CrosswordCreator class manages solving the puzzle using CSP techniques. First, it initializes domains for each variable based on word length. The enforce_node_consistency function ensures that only words matching the required length remain in each variable's domain. The revise function makes a variable arc-consistent by removing words that cannot satisfy constraints with a neighboring variable. The ac3 function iterates through all arcs, ensuring consistency by applying revise and adding constraints dynamically. The solver follows a backtracking approach to find a valid assignment once consistency checks are enforced. Additionally, helper functions allow visualization of the crossword, including printing and saving it as an image using the PIL library. However, your assignment_complete function appears to be incomplete. Let me know if you need help finalizing it!

NOTE: DATA IS CONFIDENTIAL NOT SHARED, SO PLEASE USE YOUR OWN DATA