256 lines
9.1 KiB
Python
256 lines
9.1 KiB
Python
from typing import List, Dict, Union, Callable, Any
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from paddle import nn
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from ppcls.utils import logger
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class Identity(nn.Layer):
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def __init__(self):
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super(Identity, self).__init__()
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def forward(self, inputs):
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return inputs
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class TheseusLayer(nn.Layer):
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def __init__(self, *args, **kwargs):
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super(TheseusLayer, self).__init__()
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self.res_dict = {}
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self.res_name = self.full_name()
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self.pruner = None
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self.quanter = None
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def _return_dict_hook(self, layer, input, output):
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res_dict = {"output": output}
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# 'list' is needed to avoid error raised by popping self.res_dict
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for res_key in list(self.res_dict):
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res_dict[res_key] = self.res_dict.pop(res_key)
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return res_dict
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def _save_sub_res_hook(self, layer, input, output):
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self.res_dict[self.res_name] = output
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def replace_sub(self,
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layer_name_pattern: Union[str, List[str]],
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handle_func: Callable[[nn.Layer, str], nn.Layer]) -> Dict[
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str, nn.Layer]:
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"""use 'handle_func' to modify the sub-layer(s) specified by 'layer_name_pattern'.
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Args:
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layer_name_pattern (Union[str, List[str]]): The name of layer to be modified by 'handle_func'.
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handle_func (Callable[[nn.Layer, str], nn.Layer]): The function to modify target layer specified by 'layer_name_pattern'.
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Returns:
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Dict[str, nn.Layer]: The key is the patter and corresponding value is the result returned by 'handle_func'.
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Examples:
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from paddle import nn
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import paddleclas
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def rep_func(sub_layer: nn.Layer, pattern: str):
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new_layer = nn.Conv2D(
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in_channels=sub_layer._in_channels,
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out_channels=sub_layer._out_channels,
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kernel_size=5,
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padding=2
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)
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return new_layer
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net = paddleclas.MobileNetV1()
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res = net.replace_sub(layer_name_pattern=["blocks[11].depthwise_conv.conv", "blocks[12].depthwise_conv.conv"], handle_func=rep_func)
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print(res)
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# {'blocks[11].depthwise_conv.conv': True, 'blocks[12].depthwise_conv.conv': True}
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"""
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if not isinstance(layer_name_pattern, list):
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layer_name_pattern = [layer_name_pattern]
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handle_res_dict = {}
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for pattern in layer_name_pattern:
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# pattern_list = pattern.split(".")
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# find parent layer of sub-layer specified by pattern
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sub_layer_parent, _, _ = parse_pattern_str(
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pattern=pattern, idx=(0, -1), sub_layer_parent=self)
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if not sub_layer_parent:
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continue
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# find sub-layer specified by pattern
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sub_layer, sub_layer_name, sub_layer_index = parse_pattern_str(
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pattern=pattern, idx=-1, sub_layer_parent=sub_layer_parent)
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if not sub_layer:
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continue
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new_sub_layer = handle_func(sub_layer, pattern)
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if sub_layer_index:
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getattr(sub_layer_parent,
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sub_layer_name)[sub_layer_index] = new_sub_layer
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else:
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setattr(sub_layer_parent, sub_layer_name, new_sub_layer)
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handle_res_dict[pattern] = new_sub_layer
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return handle_res_dict
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def _set_identity(self, layer, layer_name, layer_index=None):
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stop_after = False
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for sub_layer_name in layer._sub_layers:
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if stop_after:
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layer._sub_layers[sub_layer_name] = Identity()
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continue
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if sub_layer_name == layer_name:
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stop_after = True
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if layer_index and stop_after:
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stop_after = False
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for sub_layer_index in layer._sub_layers[layer_name]._sub_layers:
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if stop_after:
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layer._sub_layers[layer_name][sub_layer_index] = Identity()
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continue
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if layer_index == sub_layer_index:
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stop_after = True
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return stop_after
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def stop_after(self, stop_layer_name: str) -> bool:
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"""stop forward and backward after 'stop_layer_name'.
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Args:
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stop_layer_name (str): The name of layer that stop forward and backward after this layer.
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Returns:
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bool: 'True' if successful, 'False' otherwise.
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"""
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pattern_list = stop_layer_name.split(".")
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to_identity_list = []
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# TODO(gaotingquan): replace code by self._parse_pattern_str()
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layer = self
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while len(pattern_list) > 0:
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layer_parent = layer
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if '[' in pattern_list[0]:
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sub_layer_name = pattern_list[0].split('[')[0]
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sub_layer_index = pattern_list[0].split('[')[1].split(']')[0]
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layer = getattr(layer, sub_layer_name)[sub_layer_index]
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else:
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sub_layer_name = pattern_list[0]
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sub_layer_index = None
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layer = getattr(layer, sub_layer_name, None)
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if layer is None:
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msg = f"Not found layer by name({pattern_list[0]}) specifed in stop_layer_name({stop_layer_name})."
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logger.warning(msg)
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return False
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to_identity_list.append(
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(layer_parent, sub_layer_name, sub_layer_index))
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pattern_list = pattern_list[1:]
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for to_identity_layer in to_identity_list:
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if not self._set_identity(*to_identity_layer):
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msg = "Failed to set the layers that after stop_layer_name to IdentityLayer."
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logger.warning(msg)
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return False
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return True
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def update_res(self,
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return_patterns: Union[str, List[str]]) -> Dict[str, bool]:
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"""update the results to be returned.
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Args:
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return_patterns (Union[str, List[str]]): The name of layer to return output.
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Returns:
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Dict[str, bool]: The pattern(str) is be set successfully if 'True'(bool), failed if 'False'(bool).
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"""
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class Handler(object):
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def __init__(self, res_dict):
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self.res_dict = res_dict
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def __call__(self, layer, pattern):
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layer.res_dict = self.res_dict
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layer.res_name = pattern
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layer.register_forward_post_hook(layer._save_sub_res_hook)
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return layer
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handle_func = Handler(self.res_dict)
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return self.replace_sub(return_patterns, handle_func=handle_func)
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class WrapLayer(TheseusLayer):
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def __init__(self, sub_layer):
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super(WrapLayer, self).__init__()
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self.sub_layer = sub_layer
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def forward(self, *inputs, **kwargs):
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return self.sub_layer(*inputs, **kwargs)
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def wrap_theseus(sub_layer):
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return WrapLayer(sub_layer)
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def unwrap_theseus(sub_layer):
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if isinstance(sub_layer, WrapLayer):
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sub_layer = sub_layer.sub_layer
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return sub_layer
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def slice_pattern(pattern, idx):
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pattern_list = pattern.split(".")
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if idx:
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if isinstance(idx, tuple):
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if len(idx) == 1:
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return pattern_list[idx[0]]
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elif len(idx) == 2:
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return pattern_list[idx[0]:idx[1]]
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else:
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msg = f"Only support length of 'idx' is 1 or 2 when 'idx' is a tuple."
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logger.warning(msg)
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return None
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elif isinstance(idx, int):
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return [pattern_list[idx]]
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else:
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msg = f"Only support type of 'idx' is int or tuple."
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logger.warning(msg)
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return None
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return pattern_list
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def parse_pattern_str(pattern, sub_layer_parent, idx=None):
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pattern_list = slice_pattern(pattern, idx)
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if not pattern_list:
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return None, None, None
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while len(pattern_list) > 0:
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if '[' in pattern_list[0]:
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sub_layer_name = pattern_list[0].split('[')[0]
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sub_layer_index = pattern_list[0].split('[')[1].split(']')[0]
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else:
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sub_layer_name = pattern_list[0]
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sub_layer_index = None
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sub_layer_parent = getattr(sub_layer_parent, sub_layer_name, None)
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sub_layer_parent = unwrap_theseus(sub_layer_parent)
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if sub_layer_parent is None:
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msg = f"Not found layer named({sub_layer_name}) specifed in pattern({pattern})."
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logger.warning(msg)
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return None, sub_layer_name, sub_layer_index
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if sub_layer_index and sub_layer_parent:
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if int(sub_layer_index) < 0 or int(sub_layer_index) >= len(
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sub_layer_parent):
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msg = f"Not found layer by index({sub_layer_index}) specifed in pattern({pattern}). The lenght of sub_layer's parent layer is < '{len(sub_layer_parent)}' and > '0'."
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logger.warning(msg)
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return None, sub_layer_name, sub_layer_index
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sub_layer_parent = sub_layer_parent[sub_layer_index]
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sub_layer_parent = unwrap_theseus(sub_layer_parent)
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pattern_list = pattern_list[1:]
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return sub_layer_parent, sub_layer_name, sub_layer_index
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