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import ast
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import math
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import random
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import operator as op
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class AnyType(str):
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def __ne__(self, __value: object) -> bool:
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return False
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any = AnyType("*")
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operators = {
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ast.Add: op.add,
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ast.Sub: op.sub,
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ast.Mult: op.mul,
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ast.Div: op.truediv,
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ast.FloorDiv: op.floordiv,
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ast.Pow: op.pow,
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ast.BitXor: op.xor,
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ast.USub: op.neg,
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ast.Mod: op.mod,
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ast.BitAnd: op.and_,
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ast.BitOr: op.or_,
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ast.Invert: op.invert,
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ast.And: lambda a, b: 1 if a and b else 0,
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ast.Or: lambda a, b: 1 if a or b else 0,
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ast.Not: lambda a: 0 if a else 1,
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ast.RShift: op.rshift,
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ast.LShift: op.lshift
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}
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functions = {
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"round": {
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"args": (1, 2),
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"call": lambda a, b = None: round(a, b),
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"hint": "number, dp? = 0"
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},
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"ceil": {
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"args": (1, 1),
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"call": lambda a: math.ceil(a),
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"hint": "number"
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},
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"floor": {
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"args": (1, 1),
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"call": lambda a: math.floor(a),
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"hint": "number"
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},
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"min": {
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"args": (2, None),
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"call": lambda *args: min(*args),
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"hint": "...numbers"
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},
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"max": {
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"args": (2, None),
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"call": lambda *args: max(*args),
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"hint": "...numbers"
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},
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"randomint": {
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"args": (2, 2),
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"call": lambda a, b: random.randint(a, b),
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"hint": "min, max"
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},
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"randomchoice": {
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"args": (2, None),
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"call": lambda *args: random.choice(args),
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"hint": "...numbers"
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},
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"sqrt": {
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"args": (1, 1),
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"call": lambda a: math.sqrt(a),
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"hint": "number"
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},
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"int": {
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"args": (1, 1),
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"call": lambda a = None: int(a),
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"hint": "number"
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},
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"iif": {
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"args": (3, 3),
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"call": lambda a, b, c = None: b if a else c,
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"hint": "value, truepart, falsepart"
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},
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}
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autocompleteWords = list({
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"text": x,
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"value": f"{x}()",
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"showValue": False,
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"hint": f"{functions[x]['hint']}",
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"caretOffset": -1
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} for x in functions.keys())
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class MathExpression:
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@classmethod
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def INPUT_TYPES(cls):
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return {
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"required": {
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"expression": ("STRING", {"multiline": True, "dynamicPrompts": False, "pysssss.autocomplete": {
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"words": autocompleteWords,
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"separator": ""
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}}),
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},
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"optional": {
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"a": (any, ),
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"b": (any,),
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"c": (any, ),
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},
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"hidden": {"extra_pnginfo": "EXTRA_PNGINFO",
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"prompt": "PROMPT"},
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}
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RETURN_TYPES = ("INT", "FLOAT", )
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FUNCTION = "evaluate"
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CATEGORY = "utils"
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OUTPUT_NODE = True
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@classmethod
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def IS_CHANGED(s, expression, **kwargs):
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if "random" in expression:
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return float("nan")
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return expression
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def get_widget_value(self, extra_pnginfo, prompt, node_name, widget_name):
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workflow = extra_pnginfo["workflow"] if "workflow" in extra_pnginfo else { "nodes": [] }
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node_id = None
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for node in workflow["nodes"]:
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name = node["type"]
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if "properties" in node:
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if "Node name for S&R" in node["properties"]:
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name = node["properties"]["Node name for S&R"]
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if name == node_name:
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node_id = node["id"]
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break
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if "title" in node:
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name = node["title"]
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if name == node_name:
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node_id = node["id"]
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break
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if node_id is not None:
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values = prompt[str(node_id)]
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if "inputs" in values:
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if widget_name in values["inputs"]:
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value = values["inputs"][widget_name]
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if isinstance(value, list):
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raise ValueError("Converted widgets are not supported via named reference, use the inputs instead.")
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return value
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raise NameError(f"Widget not found: {node_name}.{widget_name}")
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raise NameError(f"Node not found: {node_name}.{widget_name}")
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def get_size(self, target, property):
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if isinstance(target, dict) and "samples" in target:
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if property == "width":
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return target["samples"].shape[3] * 8
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return target["samples"].shape[2] * 8
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else:
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if property == "width":
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return target.shape[2]
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return target.shape[1]
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def evaluate(self, expression, prompt, extra_pnginfo={}, a=None, b=None, c=None):
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expression = expression.replace('\n', ' ').replace('\r', '')
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node = ast.parse(expression, mode='eval').body
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lookup = {"a": a, "b": b, "c": c}
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def eval_op(node, l, r):
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l = eval_expr(l)
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r = eval_expr(r)
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l = l if isinstance(l, int) else float(l)
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r = r if isinstance(r, int) else float(r)
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return operators[type(node.op)](l, r)
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def eval_expr(node):
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if isinstance(node, ast.Constant) or isinstance(node, ast.Num):
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return node.n
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elif isinstance(node, ast.BinOp):
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return eval_op(node, node.left, node.right)
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elif isinstance(node, ast.BoolOp):
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return eval_op(node, node.values[0], node.values[1])
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elif isinstance(node, ast.UnaryOp):
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return operators[type(node.op)](eval_expr(node.operand))
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elif isinstance(node, ast.Attribute):
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if node.value.id in lookup:
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if node.attr == "width" or node.attr == "height":
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return self.get_size(lookup[node.value.id], node.attr)
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return self.get_widget_value(extra_pnginfo, prompt, node.value.id, node.attr)
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elif isinstance(node, ast.Name):
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if node.id in lookup:
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val = lookup[node.id]
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if isinstance(val, (int, float, complex)):
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return val
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else:
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raise TypeError(
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f"Compex types (LATENT/IMAGE) need to reference their width/height, e.g. {node.id}.width")
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raise NameError(f"Name not found: {node.id}")
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elif isinstance(node, ast.Call):
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if node.func.id in functions:
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fn = functions[node.func.id]
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l = len(node.args)
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if l < fn["args"][0] or (fn["args"][1] is not None and l > fn["args"][1]):
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if fn["args"][1] is None:
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toErr = " or more"
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else:
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toErr = f" to {fn['args'][1]}"
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raise SyntaxError(
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f"Invalid function call: {node.func.id} requires {fn['args'][0]}{toErr} arguments")
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args = []
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for arg in node.args:
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args.append(eval_expr(arg))
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return fn["call"](*args)
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raise NameError(f"Invalid function call: {node.func.id}")
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elif isinstance(node, ast.Compare):
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l = eval_expr(node.left)
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r = eval_expr(node.comparators[0])
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if isinstance(node.ops[0], ast.Eq):
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return 1 if l == r else 0
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if isinstance(node.ops[0], ast.NotEq):
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return 1 if l != r else 0
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if isinstance(node.ops[0], ast.Gt):
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return 1 if l > r else 0
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if isinstance(node.ops[0], ast.GtE):
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return 1 if l >= r else 0
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if isinstance(node.ops[0], ast.Lt):
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return 1 if l < r else 0
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if isinstance(node.ops[0], ast.LtE):
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return 1 if l <= r else 0
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raise NotImplementedError(
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"Operator " + node.ops[0].__class__.__name__ + " not supported.")
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else:
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raise TypeError(node)
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r = eval_expr(node)
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return {"ui": {"value": [r]}, "result": (int(r), float(r),)}
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NODE_CLASS_MAPPINGS = {
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"MathExpression|pysssss": MathExpression,
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}
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NODE_DISPLAY_NAME_MAPPINGS = {
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"MathExpression|pysssss": "Math Expression 🐍",
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}
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