File size: 3,384 Bytes
c14c4fe | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | from typing import Any
from typing import Dict
from typing import Union
from io import BytesIO
import logging
import torch
import torch.nn
import torch.optim
import pdb
import copy
def load_pretrained_model(
path: str,
model: torch.nn.Module,
ignore_init_mismatch: bool = True,
map_location: str = "cpu",
oss_bucket=None,
scope_map=[],
excludes=None,
**kwargs,
):
"""Load a model state and set it to the model.
Args:
init_param: <file_path>:<src_key>:<dst_key>:<exclude_Keys>
Examples:
"""
obj = model
dst_state = obj.state_dict()
logging.info(f"ckpt: {path}")
if oss_bucket is None:
ori_state = torch.load(path, map_location=map_location, weights_only=True)
else:
buffer = BytesIO(oss_bucket.get_object(path).read())
ori_state = torch.load(buffer, map_location=map_location)
src_state = copy.deepcopy(ori_state)
src_state = src_state["state_dict"] if "state_dict" in src_state else src_state
src_state = src_state["model_state_dict"] if "model_state_dict" in src_state else src_state
src_state = src_state["model"] if "model" in src_state else src_state
if isinstance(scope_map, str):
scope_map = scope_map.split(",")
scope_map += ["module.", "None"]
logging.info(f"scope_map: {scope_map}")
if excludes is not None:
if isinstance(excludes, str):
excludes = excludes.split(",")
logging.info(f"excludes: {excludes}")
for k in dst_state.keys():
excludes_flag = False
if excludes is not None:
for k_ex in excludes:
if k.startswith(k_ex):
logging.info(f"key: {k} matching: {k_ex}, excluded")
excludes_flag = True
break
if excludes_flag:
continue
k_src = k
if scope_map is not None:
src_prefix = ""
dst_prefix = ""
for i in range(0, len(scope_map), 2):
src_prefix = scope_map[i] if scope_map[i].lower() != "none" else ""
dst_prefix = scope_map[i + 1] if scope_map[i + 1].lower() != "none" else ""
if dst_prefix == "" and (src_prefix + k) in src_state.keys():
k_src = src_prefix + k
if not k_src.startswith("module."):
logging.info(f"init param, map: {k} from {k_src} in ckpt")
elif (
k.startswith(dst_prefix)
and k.replace(dst_prefix, src_prefix, 1) in src_state.keys()
):
k_src = k.replace(dst_prefix, src_prefix, 1)
if not k_src.startswith("module."):
logging.info(f"init param, map: {k} from {k_src} in ckpt")
if k_src in src_state.keys():
if ignore_init_mismatch and dst_state[k].shape != src_state[k_src].shape:
logging.info(
f"ignore_init_mismatch:{ignore_init_mismatch}, dst: {k, dst_state[k].shape}, src: {k_src, src_state[k_src].shape}"
)
else:
dst_state[k] = src_state[k_src]
else:
print(f"Warning, miss key in ckpt: {k}, {path}")
flag = obj.load_state_dict(dst_state, strict=True)
logging.info(f"Loading ckpt: {path}, status: {flag}")
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