跳至内容

参考资料 ultralytics/utils/files.py

备注

该文件可从https://github.com/ultralytics/ultralytics/blob/main/ ultralytics/utils/files .py。如果您发现问题,请通过提交 Pull Request🛠️ 帮助修复。谢谢🙏!



ultralytics.utils.files.WorkingDirectory

垒球 ContextDecorator

使用方法:@WorkingDirectory(dir) 装饰器或 "with WorkingDirectory(dir):" 上下文管理器。

源代码 ultralytics/utils/files.py
class WorkingDirectory(contextlib.ContextDecorator):
    """Usage: @WorkingDirectory(dir) decorator or 'with WorkingDirectory(dir):' context manager."""

    def __init__(self, new_dir):
        """Sets the working directory to 'new_dir' upon instantiation."""
        self.dir = new_dir  # new dir
        self.cwd = Path.cwd().resolve()  # current dir

    def __enter__(self):
        """Changes the current directory to the specified directory."""
        os.chdir(self.dir)

    def __exit__(self, exc_type, exc_val, exc_tb):  # noqa
        """Restore the current working directory on context exit."""
        os.chdir(self.cwd)

__enter__()

将当前目录更改为指定目录。

源代码 ultralytics/utils/files.py
def __enter__(self):
    """Changes the current directory to the specified directory."""
    os.chdir(self.dir)

__exit__(exc_type, exc_val, exc_tb)

在退出上下文时恢复当前工作目录。

源代码 ultralytics/utils/files.py
def __exit__(self, exc_type, exc_val, exc_tb):  # noqa
    """Restore the current working directory on context exit."""
    os.chdir(self.cwd)

__init__(new_dir)

在实例化时将工作目录设置为 "new_dir"。

源代码 ultralytics/utils/files.py
def __init__(self, new_dir):
    """Sets the working directory to 'new_dir' upon instantiation."""
    self.dir = new_dir  # new dir
    self.cwd = Path.cwd().resolve()  # current dir



ultralytics.utils.files.spaces_in_path(path)

上下文管理器,用于处理名称中包含空格的路径。如果路径包含空格,它会用 下划线,将文件/目录复制到新路径,执行上下文代码块,然后将文件/目录复制回原始位置。 文件/目录复制回原来的位置。

参数

名称 类型 说明 默认值
path str | Path

原始路径。

所需

产量

类型 说明
Path

临时路径,如果存在空格,则用下划线替换空格,否则使用原始路径。

示例
with ultralytics.utils.files import spaces_in_path

with spaces_in_path('/path/with spaces') as new_path:
    # Your code here
源代码 ultralytics/utils/files.py
@contextmanager
def spaces_in_path(path):
    """
    Context manager to handle paths with spaces in their names. If a path contains spaces, it replaces them with
    underscores, copies the file/directory to the new path, executes the context code block, then copies the
    file/directory back to its original location.

    Args:
        path (str | Path): The original path.

    Yields:
        (Path): Temporary path with spaces replaced by underscores if spaces were present, otherwise the original path.

    Example:
        ```python
        with ultralytics.utils.files import spaces_in_path

        with spaces_in_path('/path/with spaces') as new_path:
            # Your code here
        ```
    """

    # If path has spaces, replace them with underscores
    if " " in str(path):
        string = isinstance(path, str)  # input type
        path = Path(path)

        # Create a temporary directory and construct the new path
        with tempfile.TemporaryDirectory() as tmp_dir:
            tmp_path = Path(tmp_dir) / path.name.replace(" ", "_")

            # Copy file/directory
            if path.is_dir():
                # tmp_path.mkdir(parents=True, exist_ok=True)
                shutil.copytree(path, tmp_path)
            elif path.is_file():
                tmp_path.parent.mkdir(parents=True, exist_ok=True)
                shutil.copy2(path, tmp_path)

            try:
                # Yield the temporary path
                yield str(tmp_path) if string else tmp_path

            finally:
                # Copy file/directory back
                if tmp_path.is_dir():
                    shutil.copytree(tmp_path, path, dirs_exist_ok=True)
                elif tmp_path.is_file():
                    shutil.copy2(tmp_path, path)  # Copy back the file

    else:
        # If there are no spaces, just yield the original path
        yield path



ultralytics.utils.files.increment_path(path, exist_ok=False, sep='', mkdir=False)

递增文件或目录路径,如 runs/exp --> runs/exp{sep}2、runs/exp{sep}3、......等。

如果路径存在,且 exist_ok 未设置为 True,则会在路径末尾添加一个数字和 sep 来递增路径。 的末尾。如果路径是文件,将保留文件扩展名。如果路径是目录,则 数字将直接追加到路径末尾。如果 mkdir 设置为 True,路径将被创建为一个 目录。

参数

名称 类型 说明 默认值
path (str, Path)

增量之路。

所需
exist_ok bool

如果为 True,路径将不会递增,而是按原样返回。默认为 "假"。

False
sep str

路径和递增编号之间的分隔符。默认为''。

''
mkdir bool

如果目录不存在,则创建该目录。默认为 "假"。

False

返回:

类型 说明
Path

递增路径。

源代码 ultralytics/utils/files.py
def increment_path(path, exist_ok=False, sep="", mkdir=False):
    """
    Increments a file or directory path, i.e. runs/exp --> runs/exp{sep}2, runs/exp{sep}3, ... etc.

    If the path exists and exist_ok is not set to True, the path will be incremented by appending a number and sep to
    the end of the path. If the path is a file, the file extension will be preserved. If the path is a directory, the
    number will be appended directly to the end of the path. If mkdir is set to True, the path will be created as a
    directory if it does not already exist.

    Args:
        path (str, pathlib.Path): Path to increment.
        exist_ok (bool, optional): If True, the path will not be incremented and returned as-is. Defaults to False.
        sep (str, optional): Separator to use between the path and the incrementation number. Defaults to ''.
        mkdir (bool, optional): Create a directory if it does not exist. Defaults to False.

    Returns:
        (pathlib.Path): Incremented path.
    """
    path = Path(path)  # os-agnostic
    if path.exists() and not exist_ok:
        path, suffix = (path.with_suffix(""), path.suffix) if path.is_file() else (path, "")

        # Method 1
        for n in range(2, 9999):
            p = f"{path}{sep}{n}{suffix}"  # increment path
            if not os.path.exists(p):
                break
        path = Path(p)

    if mkdir:
        path.mkdir(parents=True, exist_ok=True)  # make directory

    return path



ultralytics.utils.files.file_age(path=__file__)

返回上次文件更新后的天数。

源代码 ultralytics/utils/files.py
def file_age(path=__file__):
    """Return days since last file update."""
    dt = datetime.now() - datetime.fromtimestamp(Path(path).stat().st_mtime)  # delta
    return dt.days  # + dt.seconds / 86400  # fractional days



ultralytics.utils.files.file_date(path=__file__)

返回人类可读的文件修改日期,即 "2021-3-26"。

源代码 ultralytics/utils/files.py
def file_date(path=__file__):
    """Return human-readable file modification date, i.e. '2021-3-26'."""
    t = datetime.fromtimestamp(Path(path).stat().st_mtime)
    return f"{t.year}-{t.month}-{t.day}"



ultralytics.utils.files.file_size(path)

返回文件/目录大小(MB)。

源代码 ultralytics/utils/files.py
def file_size(path):
    """Return file/dir size (MB)."""
    if isinstance(path, (str, Path)):
        mb = 1 << 20  # bytes to MiB (1024 ** 2)
        path = Path(path)
        if path.is_file():
            return path.stat().st_size / mb
        elif path.is_dir():
            return sum(f.stat().st_size for f in path.glob("**/*") if f.is_file()) / mb
    return 0.0



ultralytics.utils.files.get_latest_run(search_dir='.')

返回 /runs 中最新 "last.pt "的路径(即从 --resume 开始)。

源代码 ultralytics/utils/files.py
def get_latest_run(search_dir="."):
    """Return path to most recent 'last.pt' in /runs (i.e. to --resume from)."""
    last_list = glob.glob(f"{search_dir}/**/last*.pt", recursive=True)
    return max(last_list, key=os.path.getctime) if last_list else ""



ultralytics.utils.files.update_models(model_names=('yolov8n.pt'), source_dir=Path('.'), update_names=False)

更新并重新保存指定的YOLO 模型到 "updated_models "子目录。

参数

名称 类型 说明 默认值
model_names tuple

要更新的模型文件名,默认为 ("yolov8n.pt")。

('yolov8n.pt')
source_dir Path

包含模型和目标子目录的目录,默认为当前目录。

Path('.')
update_names bool

从数据 YAML 更新模型名称。

False
示例
from ultralytics.utils.files import update_models

model_names = (f"rtdetr-{size}.pt" for size in "lx")
update_models(model_names)
源代码 ultralytics/utils/files.py
def update_models(model_names=("yolov8n.pt",), source_dir=Path("."), update_names=False):
    """
    Updates and re-saves specified YOLO models in an 'updated_models' subdirectory.

    Args:
        model_names (tuple, optional): Model filenames to update, defaults to ("yolov8n.pt").
        source_dir (Path, optional): Directory containing models and target subdirectory, defaults to current directory.
        update_names (bool, optional): Update model names from a data YAML.

    Example:
        ```python
        from ultralytics.utils.files import update_models

        model_names = (f"rtdetr-{size}.pt" for size in "lx")
        update_models(model_names)
        ```
    """
    from ultralytics import YOLO
    from ultralytics.nn.autobackend import default_class_names

    target_dir = source_dir / "updated_models"
    target_dir.mkdir(parents=True, exist_ok=True)  # Ensure target directory exists

    for model_name in model_names:
        model_path = source_dir / model_name
        print(f"Loading model from {model_path}")

        # Load model
        model = YOLO(model_path)
        model.half()
        if update_names:  # update model names from a dataset YAML
            model.model.names = default_class_names("coco8.yaml")

        # Define new save path
        save_path = target_dir / model_name

        # Save model using model.save()
        print(f"Re-saving {model_name} model to {save_path}")
        model.save(save_path, use_dill=False)





Created 2023-11-12, Updated 2024-06-02
Authors: glenn-jocher (6), Burhan-Q (1), Laughing-q (1)