Azure 文件共享 - 递归目录搜索 os.walk

Question

我正在编写一个 Python 脚本来从 Azure 文件共享下载文件。文件共享结构如下：

/analytics/Part1/file1.txt
/analytics/Part1/file2.txt
/analytics/mainfile.txt
/analytics/Part1/Part1_1/file11.txt

我尝试在脚本中使用以下行，但它仅在根目录级别查找文件和目录。

fileshareclient = ShareClient(
    account_url=args.get('AccountURL'),
    credential=args.get('SASKey'),
    share_name=args.get('FileShare')
)

fileLst = list(
    fileshareclient.list_directories_and_files('analytics')
)

输出为：

/analytics/mainfile.txt  --> File
/analytics/Part1 --> Dir

但是，我正在寻找 Python 中的 os.walk() 函数来实现递归目录遍历。知道 Azure 文件服务是否提供此类功能 Python API?

Answer 1

built-in list_directories_and_files() method of the Azure Storage File Share client library for Python azure-storage-file-share只列出根目录和文件。如果你想os.walk()，你应该自己写方法。

这里我写了一个可以递归列出所有文件/目录的函数，效果很好（如果不符合您的需要，请随时修改）：

from azure.storage.fileshare import ShareServiceClient

def list_recursive(directory_client,directory_name):
    sub_client = directory_client.get_subdirectory_client(directory_name)
    myfiles = sub_client.list_directories_and_files()

    for file in myfiles:
        print(file.get('name'))
        if file.get('is_directory'):
            list_recursive(sub_client,file.get('name'))


if __name__ == '__main__':
    conn_str="xxxx"
    file_service = ShareServiceClient.from_connection_string(conn_str)

    share_client = file_service.get_share_client("your_share_name")
    d_client = share_client.get_directory_client("your_directory_name")
    myfiles = d_client.list_directories_and_files()

    for file in myfiles:
        print(file.get('name'))
        if file.get('is_directory'):
            list_recursive(d_client,file.get('name'))

Answer 2

老实说，我发现不得不处理两种不同的方法来做“同一件事”有点令人困惑。我更喜欢通过 from_connection_string 方法实例化目录客户端，如下面的方法。

Python 要求

pip install azure-storage-file-share==12.6.0

Python 脚本

FileShare 文件列表：

from azure.storage.fileshare import ShareServiceClient, ShareDirectoryClient, ShareFileClient
from typing import Iterator, Union
import os


def list_files(
    dir_path: str,
    share_name: str,
    connection_string: str,
    include_properties: bool = False,
    recursive: bool = True
) -> Iterator[Union[str, dict]]:
    """
    List files from FileShare on Azure Storage Account.

    Parameters
    ----------
    dir_path: str
        Directory path to list files from.
    share_name: str
        FileShare name.
    connection_string: str
        Connection string.
    include_properties: bool
        Specifies that file properties to be returned in the response.
    recursive: bool
        Specifies whether to list files recursively.

    Returns
    -------
    files_list: Iterator[Union[str, dict]]
        List of filepaths from FileShare.
        Returns a list of strings (Iterator[str]) if 'include_properties' is false.
        Otherwise, return a list of dictionaries (Iterator[dict]).

    Notes
    -----
    This method only lists files, ignoring empty directories.

    References
    ----------
    .. [1] Method 'list_files': 
    .. [2] Recursive files listing: 
    """
    dir_client = ShareDirectoryClient.from_connection_string(
        conn_str=connection_string,
        share_name=share_name,
        directory_path=dir_path
    )

    # Listing files from current directory path:
    for file in dir_client.list_directories_and_files():
        name, is_directory = file['name'], file['is_directory']
        path = os.path.join(dir_path, name)

        if is_directory:
            if recursive:
                # Listing files recursively:
                childrens = list_files(
                    dir_path=path,
                    share_name=share_name,
                    connection_string=connection_string,
                    include_properties=include_properties,
                    recursive=recursive
                )

                for child in childrens:
                    yield child
        else:
            if include_properties:
                file_client = ShareFileClient.from_connection_string(
                    conn_str=connection_string,
                    share_name=share_name,
                    file_path=path
                )

                yield file_client.get_file_properties()
            else:
                yield path

FileShare 文件列表示例：

def main() -> None:
    connection_string = "<your-conn-str>"
    share_name = "<your-share-name>"
    dir_path = ""  # Leave it empty to list files from root directory.

    files_list = list_files(
        dir_path=dir_path,
        share_name=share_name,
        connection_string=connection_string,
        include_properties=False,
        recursive=True
    )

    for i, f in enumerate(files_list, start=1):
        print(i, f)


if __name__ == '__main__':
    main()

Azure 文件共享 - 递归目录搜索 os.walk

Azure File Share - Recursive Directory Search like os.walk

azure

python-3.x

azure-files

azure-storage-files

Python 要求

Python 脚本