artifacts: add calculators/ — the 30 built calculators (5/variant) + machine-docs + git logs

calculators/builder-adversary/run-03/calc.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+"""calc — evaluate an arithmetic expression from the command line."""
+import sys
+
+from calc.lexer import LexError, tokenize
+from calc.parser import ParseError, parse
+from calc.evaluator import EvalError, evaluate
+
+
+def main():
+    if len(sys.argv) != 2:
+        print("usage: calc.py <expression>", file=sys.stderr)
+        sys.exit(1)
+    try:
+        result = evaluate(parse(tokenize(sys.argv[1])))
+        print(result)
+    except (LexError, ParseError, EvalError) as exc:
+        print(f"error: {exc}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()