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"""
Date: 2022-07-18 2:15:47 pm
Author: dihuangdh
Descriptions:
-----
LastEditTime: 2022-09-14 3:44:19 pm
LastEditors: dihuangdh
"""
import json
import pickle
import warnings
from io import BytesIO, StringIO # TODO:
from pathlib import Path
from typing import Any, Generator, Iterator, Optional, Tuple, Union
import cv2
import numpy as np
def has_method(obj: object, method: str) -> bool:
"""Check whether the object has a method.
Args:
method (str): The method name to check.
obj (object): The object to check.
Returns:
bool: True if the object has the method else False.
"""
return hasattr(obj, method) and callable(getattr(obj, method))
class PetrelBackend(object):
"""Petrel storage backend - simple version"""
def __init__(self, enable_mc: bool = False) -> None:
try:
from petrel_client.client import Client
except ImportError:
raise ImportError(
"Please install petrel_client to enable " "PetrelBackend."
)
self._client = Client('~/petreloss.conf')
def get(self, filepath) -> memoryview:
value = self._client.Get(filepath)
value_buf = memoryview(value)
return value_buf
def get_text(self, filepath, warning=False) -> str:
try:
value = self._client.Get(filepath)
except:
if warning:
warnings.warn("Failed to get text from {}".format(filepath))
value = None
else:
raise Exception("Failed to get text from {}".format(filepath))
return str(value, encoding="utf-8")
def get_uint16_png(self, filepath, warning=False) -> np.ndarray:
try:
value = np.frombuffer(self._client.get(filepath), np.uint8)
value = cv2.imdecode(value, cv2.IMREAD_UNCHANGED)
except:
if warning:
warnings.warn("Failed to get uint16_png from {}".format(filepath))
value = None
else:
raise Exception("Failed to get uint16_png from {}".format(filepath))
return value
def get_uint8_jpg(self, filepath, warning=False) -> np.ndarray:
try:
value = np.frombuffer(self._client.get(filepath), np.uint8)
value = cv2.imdecode(value, cv2.IMREAD_UNCHANGED)
except:
if warning:
warnings.warn("Failed to get uint8_jpg from {}".format(filepath))
value = None
else:
raise Exception("Failed to get uint8_jpg from {}".format(filepath))
return value
def get_npz(self, filepath, warning=False) -> Any:
try:
value = self._client.get(filepath)
value = np.loads(value)
except Exception as e:
if warning:
warnings.warn("Failed to get npz from {}".format(filepath))
value = None
else:
print(e)
raise Exception("Failed to get npz from {}".format(filepath))
return value
def get_numpy_txt(self, filepath, warning=False) -> np.ndarray:
try:
value = np.loadtxt(StringIO(self.get_text(filepath)))
except:
if warning:
warnings.warn("Failed to get numpy_txt from {}".format(filepath))
value = None
else:
raise Exception("Failed to get numpy_txt from {}".format(filepath))
return value
def get_json(self, filepath, warning=False) -> Any:
try:
value = self._client.get(filepath)
value = json.loads(value)
except:
if warning:
warnings.warn("Failed to get json from {}".format(filepath))
value = None
else:
raise Exception("Failed to get json from {}".format(filepath))
return value
def put_uint16_png(self, filepath, value) -> None:
success, img_array = cv2.imencode(".png", value, params=[cv2.CV_16U])
assert success
img_bytes = img_array.tobytes()
self._client.put(filepath, img_bytes)
# self._client.put(filepath, img_bytes, update_cache=True)
def put_uint8_jpg(self, filepath, value) -> None:
success, img_array = cv2.imencode(".jpg", value)
assert success
img_bytes = img_array.tobytes()
self._client.put(filepath, img_bytes)
# self._client.put(filepath, img_bytes, update_cache=True)
def put_npz(self, filepath, value) -> None:
value = pickle.dumps(value)
self._client.put(filepath, value)
# self._client.put(filepath, value, update_cache=True)
def put_json(self, filepath, value) -> None:
value = json.dumps(value).encode()
self._client.put(filepath, value)
# self._client.put(filepath, value, update_cache=True)
def put_text(self, filepath, value) -> None:
self._client.put(filepath, bytes(value, encoding="utf-8"))
# self._client.put(filepath, bytes(value, encoding='utf-8'), update_cache=True)
def join_path(
self, filepath: Union[str, Path], *filepaths: Union[str, Path]
) -> str:
"""Concatenate all file paths.
Args:
filepath (str or Path): Path to be concatenated.
Returns:
str: The result after concatenation.
"""
# filepath = self._format_path(self._map_path(filepath))
if filepath.endswith("/"):
filepath = filepath[:-1]
formatted_paths = [filepath]
for path in filepaths:
formatted_paths.append(path)
return "/".join(formatted_paths)
# from mmcv
def list_dir_or_file(
self,
dir_path: Union[str, Path],
list_dir: bool = True,
list_file: bool = True,
suffix: Optional[Union[str, Tuple[str]]] = None,
recursive: bool = False,
) -> Iterator[str]:
"""Scan a directory to find the interested directories or files in
arbitrary order.
Note:
Petrel has no concept of directories but it simulates the directory
hierarchy in the filesystem through public prefixes. In addition,
if the returned path ends with '/', it means the path is a public
prefix which is a logical directory.
Note:
:meth:`list_dir_or_file` returns the path relative to ``dir_path``.
In addition, the returned path of directory will not contains the
suffix '/' which is consistent with other backends.
Args:
dir_path (str | Path): Path of the directory.
list_dir (bool): List the directories. Default: True.
list_file (bool): List the path of files. Default: True.
suffix (str or tuple[str], optional): File suffix
that we are interested in. Default: None.
recursive (bool): If set to True, recursively scan the
directory. Default: False.
Yields:
Iterable[str]: A relative path to ``dir_path``.
"""
# if not has_method(self._client, 'list'):
# raise NotImplementedError(
# 'Current version of Petrel Python SDK has not supported '
# 'the `list` method, please use a higher version or dev'
# ' branch instead.')
# dir_path = self._map_path(dir_path)
# dir_path = self._format_path(dir_path)
# if list_dir and suffix is not None:
# raise TypeError(
# '`list_dir` should be False when `suffix` is not None')
# if (suffix is not None) and not isinstance(suffix, (str, tuple)):
# raise TypeError('`suffix` must be a string or tuple of strings')
# Petrel's simulated directory hierarchy assumes that directory paths
# should end with `/`
if not dir_path.endswith("/"):
dir_path += "/"
root = dir_path
def _list_dir_or_file(dir_path, list_dir, list_file, suffix, recursive):
for path in self._client.list(dir_path):
# the `self.isdir` is not used here to determine whether path
# is a directory, because `self.isdir` relies on
# `self._client.list`
if path.endswith("/"): # a directory path
next_dir_path = self.join_path(dir_path, path)
if list_dir:
# get the relative path and exclude the last
# character '/'
rel_dir = next_dir_path[len(root) : -1]
yield rel_dir
if recursive:
yield from _list_dir_or_file(
next_dir_path, list_dir, list_file, suffix, recursive
)
else: # a file path
absolute_path = self.join_path(dir_path, path)
rel_path = absolute_path[len(root) :]
if (suffix is None or rel_path.endswith(suffix)) and list_file:
yield rel_path
return _list_dir_or_file(dir_path, list_dir, list_file, suffix, recursive)
# from mmcv
def exists(self, filepath: Union[str, Path]) -> bool:
"""Check whether a file path exists.
Args:
filepath (str or Path): Path to be checked whether exists.
Returns:
bool: Return ``True`` if ``filepath`` exists, ``False`` otherwise.
"""
if not (
has_method(self._client, "contains") and has_method(self._client, "isdir")
):
raise NotImplementedError(
"Current version of Petrel Python SDK has not supported "
"the `contains` and `isdir` methods, please use a higher"
"version or dev branch instead."
)
return self._client.contains(filepath) or self._client.isdir(filepath) |