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Handle non-convergence in Simplex method #14612

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Handle non-convergence in Simplex method #14612

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5 changes: 4 additions & 1 deletion linear_programming/simplex.py
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Original file line number Diff line number Diff line change
Expand Up @@ -302,7 +302,10 @@
self.tableau = self.change_stage()
else:
self.tableau = self.pivot(row_idx, col_idx)
return {}
raise ValueError(
f"Simplex did not converge within {Tableau.maxiter} iterations. "
"The problem may be cycling or unbounded."

Check failure on line 307 in linear_programming/simplex.py

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ruff (EM102) 

linear_programming/simplex.py:306:13: EM102 Exception must not use an f-string literal, assign to variable first
  help: Assign to variable; remove f-string literal

Check failure on line 307 in linear_programming/simplex.py

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ruff (EM102) 

linear_programming/simplex.py:306:13: EM102 Exception must not use an f-string literal, assign to variable first
  help: Assign to variable; remove f-string literal
)

def interpret_tableau(self) -> dict[str, float]:
"""Given the final tableau, add the corresponding values of the basic
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