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()