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

calculators/builder-solo/run-05/calc.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+"""calc.py — command-line arithmetic calculator.
+
+Usage: python calc.py "<expression>"
+"""
+
+import sys
+
+from calc.evaluator import EvalError, evaluate
+from calc.lexer import LexError, tokenize
+from calc.parser import ParseError, parse
+
+
+def main():
+    if len(sys.argv) != 2:
+        print("Usage: calc.py <expression>", file=sys.stderr)
+        sys.exit(1)
+
+    expr = sys.argv[1]
+    try:
+        tokens = tokenize(expr)
+        ast = parse(tokens)
+        result = evaluate(ast)
+        print(result)
+    except (LexError, ParseError, EvalError) as e:
+        print(f"Error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()