Python对文件和目录进行操作（file对象/os/os.path/shutil 模块）

importjson#use json file ,you must import json.  

defverify_file_class():  

  file_json=open(r'C:\temp\config_file.json','r')# open config_file.json file with 'r'  

  foreach_lineinfile_json.readlines():    #read each line data  

    printeach_line              # verify each line data by print each line data  

    each_line_dict=json.loads(each_line)   # each row of the data into the 'dict'type of python  

    print'the type of the each_line_dict:{type}'.format(type=type(each_line_dict))# verify whether is‘dict'type  

    print'user is: {user}'.format(user=each_line_dict['user'])  

    print'username is: {username}'.format(username=each_line_dict['username'])  

    print'password is: {password}'.format(password=each_line_dict['password'])  

    print'ipaddr is: {ipaddr} \n'.format(ipaddr=each_line_dict['ipaddr'])  

    #use username,password, ipaddr ( enjoy your programming ! )  

  file_json.close() # don't forgot to close your open file before.  

if__name__=='__main__':  

  verify_file_class()

{"user":"Tom","username":"root_tom","password":"Jerryispig","ipaddr":"10.168.79.172"}  

thetypeof the each_line_dict:  

useris: Tom  

usernameis: root_tom  

passwordis: Jerryispig  

ipaddris:10.168.79.172   

{"user":"Jerry","username":"root_jerry","password":"Tomispig","ipaddr":"10.168.79.173"}  

thetypeof the each_line_dict:  

useris: Jerry  

usernameis: root_jerry  

passwordis: Tomispig  

ipaddris:10.168.79.173

code运行环境：python27+eclipse+pydev

importos 

importshutil  

defempty_folder(dir): 

  try: 

    foreachinos.listdir(dir): 

      path=os.path.join(dir,each) 

      ifos.path.isfile(path): 

        os.remove(path) 

      elifos.path.isdir(path): 

        shutil.rmtree(path) 

    return0 

  exceptException as e: 

    return1 

if__name__=='__main__': 

  dir_path=r'D:\installation' 

  empty_folder(dir_path)

1.os.listdir(dir) 

2.os.path.join(dir, each) 

3.os.path.isfile(path)/os.path.isdir(path) 

4.os.remove(path) 

5.shutil.rmtree(path)

>>>importos 

>>> os.listdir(r'c:\\') 

['$Recycle.Bin','Documents and Settings','eclipse','hiberfil.sys','inetpub','Intel','logon_log.txt','MSOCache','pagefile.sys','PerfLogs']

>>>importos 

>>> os.path.join(r'c:\doog',r's.txt') 

'c:\\doog\\s.txt' 

>>> os.path.join(r'c:\doog',r'file') 

'c:\\doog\\file'

>>>importos 

>>> filepath=r'C:\Program Files (x86)\Google\Chrome\Application\VisualElementsManifest.xml' 

>>> os.path.isdir(filepath) 

False 

>>> os.path.isfile(filepath) 

True

>>>importos 

>>> os.removedirs(r'c:\temp\david\book\python.txt')

>>>importshutil 

>>> shutil.rmtree(r'C:\no1')