PyFilesystem是否支持多种模式组合使用？

Absolutely! PyFilesystem fully supports combining multiple filesystem modes exactly as you described—using a URL like ftp+tar://user:password@host:port/path/file.tar.gz to access a tar file hosted on an FTP server works perfectly.

How it works #

PyFilesystem uses a "nested filesystem" approach, where the + in the URL tells the library to chain together different filesystem drivers. Here’s what happens under the hood:

1. It first uses the FTP driver to establish a connection to the remote server and locate the target tar.gz file.
2. Then it mounts that tar file as a virtual filesystem using the Tar driver, letting you interact with the contents of the tar directly without downloading the entire file first.

Two ways to use this combination #

1. Directly via FS URL (simplest approach)

You can open the combined filesystem in one line using fs.open_fs():

from fs import open_fs

with open_fs("ftp+tar://user:password@host:port/path/file.tar.gz") as combined_fs:
    # List files inside the tar archive
    print(combined_fs.listdir("/"))
    # Read a file from the tar
    with combined_fs.opentext("document.txt") as f:
        print(f.read())

2. Manual nesting (for more control)

If you need to customize settings (like FTP timeouts, tar compression options), you can manually nest the filesystems:

from fs.ftpfs import FTPFS
from fs.tarfs import TarFS

# Connect to the FTP server with custom settings
with FTPFS(
    host="your-host",
    user="your-username",
    passwd="your-password",
    port=21,
    timeout=30
) as ftp_fs:
    # Open the remote tar.gz file as a binary stream
    with ftp_fs.openbin("/path/to/file.tar.gz") as tar_stream:
        # Mount the stream as a Tar filesystem
        with TarFS(tar_stream) as tar_fs:
            # Interact with the tar contents
            tar_fs.copy("/report.pdf", "./local-report.pdf")

Important Notes #

• Make sure you have the required dependencies installed: Run pip install fs[ftp,tar] to get both the FTP and Tar filesystem drivers.
• While not all driver combinations work seamlessly, FTP + Tar is officially supported because TarFS can operate on a binary stream (which FTPFS provides for remote files).

内容的提问来源于stack exchange，提问作者Anton Daneyko