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import ast
import math
import random
import operator as op
operators = {
ast.Add: op.add,
ast.Sub: op.sub,
ast.Mult: op.mul,
ast.Div: op.truediv,
ast.FloorDiv: op.floordiv,
ast.Pow: op.pow,
ast.BitXor: op.xor,
ast.USub: op.neg,
ast.Mod: op.mod
}
# TODO: restructure args to provide more info, generate hint based on args to save duplication
functions = {
"round": {
"args": (1, 2),
"call": lambda a, b = None: round(a, b),
"hint": "number, dp? = 0"
},
"ceil": {
"args": (1, 1),
"call": lambda a: math.ceil(a),
"hint": "number"
},
"floor": {
"args": (1, 1),
"call": lambda a: math.floor(a),
"hint": "number"
},
"min": {
"args": (2, None),
"call": lambda *args: min(*args),
"hint": "...numbers"
},
"max": {
"args": (2, None),
"call": lambda *args: max(*args),
"hint": "...numbers"
},
"randomint": {
"args": (2, 2),
"call": lambda a, b: random.randint(a, b),
"hint": "min, max"
},
"randomchoice": {
"args": (2, None),
"call": lambda *args: random.choice(args),
"hint": "...numbers"
},
}
autocompleteWords = list({
"text": x,
"value": f"{x}()",
"showValue": False,
"hint": f"{functions[x]['hint']}",
"caretOffset": -1
} for x in functions.keys())
class MathExpression:
@classmethod
def INPUT_TYPES(cls):
return {
"required": {
"expression": ("STRING", {"multiline": True, "dynamicPrompts": False, "pysssss.autocomplete": {
"words": autocompleteWords,
"separator": ""
}}),
},
"optional": {
"a": ("INT,FLOAT,IMAGE,LATENT", ),
"b": ("INT,FLOAT,IMAGE,LATENT",),
"c": ("INT,FLOAT,IMAGE,LATENT", ),
},
"hidden": {"extra_pnginfo": "EXTRA_PNGINFO",
"prompt": "PROMPT"},
}
RETURN_TYPES = ("INT", "FLOAT", )
FUNCTION = "evaluate"
CATEGORY = "utils"
OUTPUT_NODE = True
@classmethod
def IS_CHANGED(s, expression, **kwargs):
if "random" in expression:
return float("nan")
return expression
def get_widget_value(self, extra_pnginfo, prompt, node_name, widget_name):
workflow = extra_pnginfo["workflow"]
node_id = None
for node in workflow["nodes"]:
name = node["type"]
if "properties" in node:
if "Node name for S&R" in node["properties"]:
name = node["properties"]["Node name for S&R"]
if name == node_name:
node_id = node["id"]
break
if "title" in node:
name = node["title"]
if name == node_name:
node_id = node["id"]
break
if node_id is not None:
values = prompt[str(node_id)]
if "inputs" in values:
if widget_name in values["inputs"]:
return values["inputs"][widget_name]
raise NameError(f"Widget not found: {node_name}.{widget_name}")
raise NameError(f"Node not found: {node_name}.{widget_name}")
def get_size(self, target, property):
if isinstance(target, dict) and "samples" in target:
# Latent
if property == "width":
return target["samples"].shape[3] * 8
return target["samples"].shape[2] * 8
else:
# Image
if property == "width":
return target.shape[2]
return target.shape[1]
def evaluate(self, expression, extra_pnginfo, prompt, a=None, b=None, c=None):
expression = expression.replace('\n', ' ').replace('\r', '')
node = ast.parse(expression, mode='eval').body
lookup = {"a": a, "b": b, "c": c}
def eval_expr(node):
if isinstance(node, ast.Num):
return node.n
elif isinstance(node, ast.BinOp):
return operators[type(node.op)](float(eval_expr(node.left)), float(eval_expr(node.right)))
elif isinstance(node, ast.UnaryOp):
return operators[type(node.op)](eval_expr(node.operand))
elif isinstance(node, ast.Attribute):
if node.value.id in lookup:
if node.attr == "width" or node.attr == "height":
return self.get_size(lookup[node.value.id], node.attr)
return self.get_widget_value(extra_pnginfo, prompt, node.value.id, node.attr)
elif isinstance(node, ast.Name):
if node.id in lookup:
val = lookup[node.id]
if isinstance(val, (int, float, complex)):
return val
else:
raise TypeError(
f"Compex types (LATENT/IMAGE) need to reference their width/height, e.g. {node.id}.width")
raise NameError(f"Name not found: {node.id}")
elif isinstance(node, ast.Call):
if node.func.id in functions:
fn = functions[node.func.id]
l = len(node.args)
if l < fn["args"][0] or (fn["args"][1] is not None and l > fn["args"][1]):
if fn["args"][1] is None:
toErr = " or more"
else:
toErr = f" to {fn['args'][1]}"
raise SyntaxError(
f"Invalid function call: {node.func.id} requires {fn['args'][0]}{toErr} arguments")
args = []
for arg in node.args:
args.append(eval_expr(arg))
return fn["call"](*args)
raise NameError(f"Invalid function call: {node.func.id}")
else:
raise TypeError(node)
r = eval_expr(node)
return {"ui": {"value": [r]}, "result": (int(r), float(r),)}
NODE_CLASS_MAPPINGS = {
"MathExpression|pysssss": MathExpression,
}
NODE_DISPLAY_NAME_MAPPINGS = {
"MathExpression|pysssss": "Math Expression 🐍",
}
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