python批量提取eml附件

从批量eml文件中提取附件，使用方式如下

代码如下

import email
import os
import sys

#获取eml附件信息
def Get_Annex_Message(FilePath, Annex_Path):
    global sum
    try:
        fp = open(FilePath, 'rb')        #打开任意格式文件，通过email库来判断是否为eml文件
        msg = email.message_from_binary_file(fp)
        for part in msg.walk():            #循环信件中的每一个mime的数据块
            if part.get_content_maintype() == 'multipart':
                continue
            Annex_name = part.get_filename()
            if Annex_name:        #如果附件存在名字
                Annex_name = str(sum) + '.' + Annex_name
                fp = open(os.path.join(Annex_Path, Annex_name), 'wb')
                fp.write(part.get_payload(decode=True))
                sum += 1
                
    except Exception as e:
        print(e)
        return
        
#递归文件夹下所有文件
def List_Filepath(Eml_Path, Annex_Path):
    for parent,dirnames,filenames in os.walk(Eml_Path): #遍历文件夹
        for dirname in dirnames:        #对文件夹进行递归
            List_Filepath(dirname, Annex_Path)
        for filename in filenames:        #r对文件进行判断
            FilePath = os.path.join(parent,filename)
            Get_Annex_Message(FilePath, Annex_Path)
        
#创建目的文件夹
def Create_Dir(Annex_Path):
    if os.path.exists(Annex_Path):
        print("dir exists, Annex file will create in %s" % Annex_Path)
    else:
        os.mkdir(Annex_Path)
        
#主函数
def main():
    global sum 
    sum = int(1)
    Eml_Path = sys.argv[1]        #第一个参数为eml所在文件夹
    Annex_Path = sys.argv[2]    #第二个参数为eml附件输出的路径
    Create_Dir(Annex_Path)        #创建保存附加的文件夹
    List_Filepath(Eml_Path, Annex_Path)        

if __name__ == "__main__":
    main()