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import comfy.utils
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import folder_paths
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import torch
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import logging
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def load_hypernetwork_patch(path, strength):
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sd = comfy.utils.load_torch_file(path, safe_load=True)
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activation_func = sd.get('activation_func', 'linear')
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is_layer_norm = sd.get('is_layer_norm', False)
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use_dropout = sd.get('use_dropout', False)
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activate_output = sd.get('activate_output', False)
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last_layer_dropout = sd.get('last_layer_dropout', False)
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valid_activation = {
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"linear": torch.nn.Identity,
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"relu": torch.nn.ReLU,
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"leakyrelu": torch.nn.LeakyReLU,
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"elu": torch.nn.ELU,
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"swish": torch.nn.Hardswish,
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"tanh": torch.nn.Tanh,
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"sigmoid": torch.nn.Sigmoid,
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"softsign": torch.nn.Softsign,
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"mish": torch.nn.Mish,
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}
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if activation_func not in valid_activation:
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logging.error("Unsupported Hypernetwork format, if you report it I might implement it. {} {} {} {} {} {}".format(path, activation_func, is_layer_norm, use_dropout, activate_output, last_layer_dropout))
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return None
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out = {}
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for d in sd:
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try:
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dim = int(d)
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except:
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continue
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output = []
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for index in [0, 1]:
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attn_weights = sd[dim][index]
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keys = attn_weights.keys()
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linears = filter(lambda a: a.endswith(".weight"), keys)
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linears = list(map(lambda a: a[:-len(".weight")], linears))
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layers = []
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i = 0
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while i < len(linears):
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lin_name = linears[i]
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last_layer = (i == (len(linears) - 1))
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penultimate_layer = (i == (len(linears) - 2))
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lin_weight = attn_weights['{}.weight'.format(lin_name)]
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lin_bias = attn_weights['{}.bias'.format(lin_name)]
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layer = torch.nn.Linear(lin_weight.shape[1], lin_weight.shape[0])
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layer.load_state_dict({"weight": lin_weight, "bias": lin_bias})
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layers.append(layer)
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if activation_func != "linear":
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if (not last_layer) or (activate_output):
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layers.append(valid_activation[activation_func]())
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if is_layer_norm:
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i += 1
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ln_name = linears[i]
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ln_weight = attn_weights['{}.weight'.format(ln_name)]
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ln_bias = attn_weights['{}.bias'.format(ln_name)]
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ln = torch.nn.LayerNorm(ln_weight.shape[0])
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ln.load_state_dict({"weight": ln_weight, "bias": ln_bias})
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layers.append(ln)
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if use_dropout:
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if (not last_layer) and (not penultimate_layer or last_layer_dropout):
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layers.append(torch.nn.Dropout(p=0.3))
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i += 1
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output.append(torch.nn.Sequential(*layers))
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out[dim] = torch.nn.ModuleList(output)
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class hypernetwork_patch:
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def __init__(self, hypernet, strength):
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self.hypernet = hypernet
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self.strength = strength
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def __call__(self, q, k, v, extra_options):
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dim = k.shape[-1]
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if dim in self.hypernet:
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hn = self.hypernet[dim]
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k = k + hn[0](k) * self.strength
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v = v + hn[1](v) * self.strength
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return q, k, v
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def to(self, device):
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for d in self.hypernet.keys():
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self.hypernet[d] = self.hypernet[d].to(device)
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return self
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return hypernetwork_patch(out, strength)
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class HypernetworkLoader:
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@classmethod
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def INPUT_TYPES(s):
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return {"required": { "model": ("MODEL",),
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"hypernetwork_name": (folder_paths.get_filename_list("hypernetworks"), ),
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"strength": ("FLOAT", {"default": 1.0, "min": -10.0, "max": 10.0, "step": 0.01}),
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}}
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RETURN_TYPES = ("MODEL",)
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FUNCTION = "load_hypernetwork"
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CATEGORY = "loaders"
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def load_hypernetwork(self, model, hypernetwork_name, strength):
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hypernetwork_path = folder_paths.get_full_path("hypernetworks", hypernetwork_name)
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model_hypernetwork = model.clone()
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patch = load_hypernetwork_patch(hypernetwork_path, strength)
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if patch is not None:
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model_hypernetwork.set_model_attn1_patch(patch)
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model_hypernetwork.set_model_attn2_patch(patch)
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return (model_hypernetwork,)
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NODE_CLASS_MAPPINGS = {
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"HypernetworkLoader": HypernetworkLoader
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}
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