在Python中使用shutil、urllib和contextlib下载FTP文件和另存为

import shutil

def download_ftp_file(ftp_url, local_path):
    with urllib.request.urlopen(ftp_url) as response, open(local_path, 'wb') as out_file:
        shutil.copyfileobj(response, out_file)

# 调用函数下载FTP文件
ftp_url = 'ftp://example.com/file.txt'
local_path = 'local_file.txt'
download_ftp_file(ftp_url, local_path)

import urllib.request

def download_ftp_file(ftp_url, local_path):
    urllib.request.urlretrieve(ftp_url, local_path)

# 调用函数下载FTP文件
ftp_url = 'ftp://example.com/file.txt'
local_path = 'local_file.txt'
download_ftp_file(ftp_url, local_path)

import urllib.request
from contextlib import contextmanager

@contextmanager
def open_local_file(local_path):
    with open(local_path, 'wb') as file:
        yield file

def download_ftp_file(ftp_url, local_path):
    with urllib.request.urlopen(ftp_url) as response, open_local_file(local_path) as out_file:
        shutil.copyfileobj(response, out_file)

# 调用函数下载FTP文件
ftp_url = 'ftp://example.com/file.txt'
local_path = 'local_file.txt'
download_ftp_file(ftp_url, local_path)