仅使用Python在FTP中下载昨天的文件

问题描述

我想使用以下Python编程代码通过FTP仅下载昨天的文件，下面的代码下载所有文件。我想对照昨天的日期检查代码中的上次修改时间戳，并仅自动下载昨天的文件。我真的需要帮助，感谢您的任何建议：

import ftplib
import os
from datetime import date 
from dateutil import parser

FTP_HOST = "Remote IP"
FTP_USER = "Username"
FTP_PASS = "Password"

# some utility functions that we gonna need
def get_size_format(n,suffix="B"):
    # converts bytes to scaled format (e.g KB,MB,etc.)
    for unit in ["","K","M","G","T","P"]:
        if n < 1024:
            return f"{n:.2f}{unit}{suffix}"
        n /= 1024

def get_datetime_format(date_time):
    # convert to datetime object
    date_time = datetime.strptime(date_time,"%Y%m%d%H%M%s")
    # convert to human readable date time string
    return date_time.strftime("%Y/%m/%d %H:%M:%s")
    
# initialize FTP session
ftp = ftplib.FTP(FTP_HOST,FTP_USER,FTP_PASS)
# force UTF-8 encoding
ftp.encoding = "utf-8"
# print the welcome message
print(ftp.getwelcome())
# change the current working directory to 'pub' folder and 'maps' subfolder
ftp.cwd("RemoteDirectory")

print("*"*50,"NLST","*"*50)

print("{:20} {:19}".format("File_Name","last_modified"))

for file_data in ftp.mlsd():
    file_name,Meta = file_data
    # convert it to human readable format (i.e in 'KB','MB',etc)
    last_modified = get_datetime_format(Meta.get("modify"))
  
    try:
        ftp.cwd(file_name)
        
    except Exception as e:
        ftp.voidcmd("TYPE I")
        last_modified = get_datetime_format(Meta.get("modify"))
        
        
    print(f"{file_name:20} {last_modified:19}")
    ftp.retrbinary("RETR " + file_name,open(file_name,'wb').write)

# quit and close the connection
ftp.quit()

解决方法

基于Python Datetime: All Items From Yesterday，这应该可以做到：

yesterday = date.today() - timedelta(days=1)

for file_data in ftp.mlsd():
    file_name,meta = file_data
    last_modified = datetime.strptime(meta.get("modify"),"%Y%m%d%H%M%S")
    if last_modified.date() == yesterday:
        ftp.retrbinary("RETR " + file_name,open(file_name,'wb').write)

ftp ftplib python