Fix RuntimeError in bipartite-check DFS/BFS and clean up doctests #12814
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* Iteration over `graph` mutated by `defaultdict` neighbours caused `RuntimeError: dictionary changed size during iteration`. – Iterate over `list(graph)` in both DFS and BFS helpers. * Corrected `if __name__ == "__main__":` typo. * Updated two doctests that now succeed after the fix. All doctests now pass (`30/30`), eliminating a critical runtime failure and improving reliability of the graph algorithms. Co-Authored-By: S. M. Mohiuddin Khan Shiam <147746955+mohiuddin-khan-shiam@users.noreply.github.com>
Iteration over graph mutated by defaultdict neighbours caused
RuntimeError: dictionary changed size during iteration.
– Iterate over list(graph) in both DFS and BFS helpers.
Corrected if __name__ == "__main__": typo.
Updated two doctests that now succeed after the fix.
All doctests now pass (30/30), eliminating a critical runtime failure and improving reliability of the graph algorithms.
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Fix
RuntimeErrorin bipartite-check DFS/BFS and clean up doctestsDescription
graphmutated bydefaultdictneighbours causedRuntimeError: dictionary changed size during iteration.– Iterate over
list(graph)in both DFS and BFS helpers.if __name__ == "__main__":typo.All doctests now pass (
30/30), eliminating a critical runtime failure and improving reliability of the graph algorithms.