(node)
| 40 | """ |
| 41 | |
| 42 | def eval_node(node): |
| 43 | if isinstance(node, ast.Constant): # numbers like 1, 2.5 |
| 44 | if isinstance(node.value, (int, float)): |
| 45 | return node.value |
| 46 | raise TypeError(f"Unsupported constant type: {type(node.value).__name__}") |
| 47 | |
| 48 | if isinstance(node, ast.Name): # variable like x |
| 49 | if node.id in vars: |
| 50 | v = vars[node.id] |
| 51 | if not isinstance(v, int): |
| 52 | raise TypeError( |
| 53 | f"Variable '{node.id}' must be int, got {type(v).__name__}" |
| 54 | ) |
| 55 | return v |
| 56 | raise NameError(f"Unknown variable: {node.id}") |
| 57 | |
| 58 | if isinstance(node, ast.BinOp): |
| 59 | op_type = type(node.op) |
| 60 | if op_type not in _BIN_OPS: |
| 61 | raise TypeError(f"Unsupported operator: {op_type.__name__}") |
| 62 | return _BIN_OPS[op_type](eval_node(node.left), eval_node(node.right)) |
| 63 | |
| 64 | if isinstance(node, ast.UnaryOp): |
| 65 | op_type = type(node.op) |
| 66 | if op_type not in _UNARY_OPS: |
| 67 | raise TypeError(f"Unsupported unary operator: {op_type.__name__}") |
| 68 | return _UNARY_OPS[op_type](eval_node(node.operand)) |
| 69 | |
| 70 | # Anything else is not allowed (Call, Attribute, Subscript, etc.) |
| 71 | raise TypeError(f"Unsupported expression node: {type(node).__name__}") |
| 72 | |
| 73 | tree = ast.parse(expr, mode="eval") |
| 74 | value = eval_node(tree.body) |
no outgoing calls
no test coverage detected