Python uses Paramiko to easily determine file types

1. Introduction to Paramiko

Paramiko is a Python implementation for the SSHv2 protocol, providing client and server functions. It can be used to remotely connect to and manage servers, execute commands, upload and download files, etc. This article will introduce how to use Paramiko to determine file types and extract the file's upper directory.

2. Install Paramiko

The Paramiko library needs to be installed. Enter the following command in the command line to install:

pip install paramiko

3. Connect to the SSH server

Before using Paramiko, you need to connect to the SSH server first. Here is a simple example:

import paramiko

ssh = ()
ssh.set_missing_host_key_policy(())
('', username='your_username', password='your_password')

4. Determine file type

You can use the isdir() method to determine whether a path is a directory. If it is a directory, return True; otherwise, return False.

def is_directory(sftp, path):
    try:
        return (path).st_mode & 0o40000 == 0o40000
    except FileNotFoundError:
        return False

5. Extract the file's superior directory

Python's os module can be used to extract the file's upper directory.

import os

​​​​​​​def get_parent_directory(path):
    return (path)

6. Complete example

Now the above code can be integrated together to achieve the function of judging file types and extracting the upper directory.

import paramiko
import os

def is_directory(sftp, path):
    try:
        return (path).st_mode & 0o40000 == 0o40000
    except FileNotFoundError:
        return False

def get_parent_directory(path):
    return (path)

ssh = ()
ssh.set_missing_host_key_policy(())
('', username='your_username', password='your_password')

sftp = ssh.open_sftp()

file_path = '/path/to/your/file'

if is_directory(sftp, file_path):
    print(f"{file_path} It's a directory")
else:
    print(f"{file_path} It's a file")

parent_directory = get_parent_directory(file_path)
print(f"{file_path} The upper directory is {parent_directory}")

()
()

7. Summary

This article introduces how to use Paramiko to determine file types and extract the file's upper directory. With these tips, you can more easily manage files on remote servers.

8. Extension

Let's take a look at how to use Paramiko and FTP in Python to implement folder and file detection

ParamikoIt is a Python library for SSH connections. It supports remote command execution, file transfer and other operations in encrypted form. on the other hand,FTPThat is, the file transfer protocol, used to transfer files on the network. In PythonftplibThe module allows the implementation of the functions of the FTP client, including listing directory contents, uploading and downloading files, etc.

Check if the folder exists

Check remote folders with Paramiko

To check if the folder on the remote server exists, you can useParamikolibrary to executelsCommand and capture the result.

import paramiko

ssh = ()
ssh.set_missing_host_key_policy(())
('hostname', username='user', password='pass')

folder_path = '/path/to/directory'
stdin, stdout, stderr = ssh.exec_command(f'ls {folder_path}')

if not ():
    print(f"Folder {folder_path} exists.")
else:
    print(f"Folder {folder_path} does not exist.")

()

Check folders using FTP

In useFTPWhen you can use itcwdMethods try to switch to the target directory to determine if the folder exists.

from ftplib import FTP

ftp = FTP('hostname')
(user='username', passwd='password')

folder_path = '/path/to/directory'
try:
    (folder_path)
    print(f"Folder {folder_path} exists.")
except Exception as e:
    print(f"Folder {folder_path} does not exist.")

()

Check if the file exists

Check remote files using Paramiko

forParamiko, can be usedModule coordinationSSHSession to confirm whether the file exists.

import os
import paramiko

ssh = ()
ssh.set_missing_host_key_policy(())
('hostname', username='user', password='pass')

file_path = '/path/to/file'
stdin, stdout, stderr = ssh.exec_command(f'test -e {file_path} && echo "File exists" || echo "File does not exist"')

output = ().decode()
if "File exists" in output:
    print(f"File {file_path} exists.")
else:
    print(f"File {file_path} does not exist.")

()

Check files using FTP

In useFTPWhen using it, it can be used simplysendcmdThe method cooperates with the LIST command to check whether the file exists.

from ftplib import FTP

ftp = FTP('hostname')
(user='username', passwd='password')

file_name = ''
resp = []
('LIST', file_name, )
if any(file_name in line for line in resp):
    print(f"File {file_name} exists.")
else:
    print(f"File {file_name} does not exist.")

()

With these code snippets, you can easily use it in PythonParamikoandFTPTo check whether folders and files on the remote server exist, so as to better manage and operate file resources on the network. Remember, these are just basic examples, and further error handling and logic optimization may be required in practical applications.

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