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        "description": "# Fdfs_client py\n\nThe Python interface to the Fastdfs Ver 4.06.\n\n## Installation\n\n    $ sudo python setup.py install\n\n## Getting Started\n\t1. import fdfs_client.client module\n\t2. instantiate class Fdfs_client\n\t3. call memeber functions\n\n    >>> from fdfs_client.client import *\n    >>> client = Fdfs_client('/etc/fdfs/client.conf')\n    >>> ret = client.upload_by_filename('test')\n\t>>> ret\n\t{'Group name':'group1','Status':'Upload successed.', 'Remote file_id':'group1/M00/00/00/\n    \twKjzh0_xaR63RExnAAAaDqbNk5E1398.py','Uploaded size':'6.0KB','Local file name':'test'\n\t\t, 'Storage IP':'192.168.243.133'}\n\n## API Reference\n\nClass Fdfs_client:\n\nmember functions:\n\n* upload_by_filename(self, filename, meta_dict = None)\n  '''\n  Upload a file to Storage server.\n  arguments:\n        @filename: string, name of file that will be uploaded\n        @meta_dict: dictionary e.g.:{\n            'ext_name'  : 'jpg',\n            'file_size' : '10240B',\n            'width'     : '160px',\n            'hight'     : '80px'\n        } meta_dict can be null\n        @return dict {\n            'Group name'      : group_name,\n            'Remote file_id'  : remote_file_id,\n            'Status'          : 'Upload successed.',\n            'Local file name' : local_file_name,\n            'Uploaded size'   : upload_size,\n            'Storage IP'      : storage_ip\n        } if success else None\n\n* upload_by_buffer(self, filebuffer, file_ext_name = None, meta_dict = None)\n  '''\n  Upload a buffer to Storage server.\n  arguments:\n        @filebuffer: string, buffer\n        @file_ext_name: string, file extend name\n        @meta_dict: dictionary e.g.:{\n            'ext_name'  : 'jpg',\n            'file_size' : '10240B',\n            'width'     : '160px',\n            'hight'     : '80px'\n        }\n        @return dict {\n            'Group name'      : group_name,\n            'Remote file_id'  : remote_file_id,\n            'Status'          : 'Upload successed.',\n            'Local file name' : '',\n            'Uploaded size'   : upload_size,\n            'Storage IP'      : storage_ip\n        }\n  '''\n\n* upload_slave_by_filename(self, filename, remote_file_id, prefix_name, \\\n                                 meta_dict = None)\n  '''\n  Upload slave file to Storage server.\n  arguments:\n       @filename: string, local file name\n       @remote_file_id: string, remote file id\n       @prefix_name: string\n       @meta_dict: dictionary e.g.:{\n           'ext_name'  : 'jpg',\n           'file_size' : '10240B',\n           'width'     : '160px',\n           'hight'     : '80px'\n       }\n       @return dictionary {\n           'Status'        : 'Upload slave successed.',\n           'Local file name' : local_filename,\n           'Uploaded size'   : upload_size,\n           'Remote file id'  : remote_file_id,\n           'Storage IP'      : storage_ip\n       }\n  '''\n\n* upload_slave_by_buffer(self, filebuffer, remote_file_id, \\\n                               meta_dict = None, file_ext_name = None)\n  '''\n  Upload slave file by buffer\n  arguments:\n       @filebuffer: string\n       @remote_file_id: string\n       @meta_dict: dictionary e.g.:{\n           'ext_name'  : 'jpg',\n           'file_size' : '10240B',\n           'width'     : '160px',\n           'hight'     : '80px'\n       }\n       @return dictionary {\n           'Status'        : 'Upload slave successed.',\n           'Local file name' : local_filename,\n           'Uploaded size'   : upload_size,\n           'Remote file id'  : remote_file_id,\n           'Storage IP'      : storage_ip\n       }\n  '''\n\n* upload_appender_by_filename(self, local_filename, meta_dict = None)\n  '''\n  Upload an appender file by filename.\n  arguments:\n       @local_filename: string\n       @meta_dict: dictionary e.g.:{\n           'ext_name'  : 'jpg',\n           'file_size' : '10240B',\n           'width'     : '160px',\n           'hight'     : '80px'\n       }    Notice: it can be null\n       @return dict {\n           'Group name'      : group_name,\n           'Remote file_id'  : remote_file_id,\n           'Status'          : 'Upload successed.',\n           'Local file name' : '',\n           'Uploaded size'   : upload_size,\n           'Storage IP'      : storage_ip\n\t   }\n  '''\n\n* upload_appender_by_buffer(self, filebuffer, file_ext_name = None, meta_dict = None)\n  '''\n  Upload a buffer to Storage server.\n  arguments:\n       @filebuffer: string\n       @file_ext_name: string, can be null\n       @meta_dict: dictionary, can be null\n       @return dict {\n           'Group name'      : group_name,\n           'Remote file_id'  : remote_file_id,\n           'Status'          : 'Upload successed.',\n           'Local file name' : '',\n           'Uploaded size'   : upload_size,\n           'Storage IP'      : storage_ip\n       }\n  '''\n\n* delete_file(self, remote_file_id)\n  '''\n  Delete a file from Storage server.\n  arguments:\n       @remote_file_id: string, file_id of file that is on storage server\n       @return tuple ('Delete file successed.', remote_file_id, storage_ip)\n  '''\n\n* download_to_file(self, local_filename, remote_file_id, offset = 0, down_bytes = 0)\n  '''\n  Download a file from Storage server.\n  arguments:\n       @local_filename: string, local name of file \n       @remote_file_id: string, file_id of file that is on storage server\n\t   @offset: long\n\t   @down_bytes: long\n       @return dict {\n           'Remote file_id'  : remote_file_id,\n           'Content'         : local_filename,\n           'Download size'   : downloaded_size,\n           'Storage IP'      : storage_ip\n       }\n  '''\n\n* download_to_buffer(self, remote_file_id, offset = 0, down_bytes = 0)\n  '''\n  Download a file from Storage server and store in buffer.\n  arguments:\n\t   @remote_file_id: string, file_id of file that is on storage server\n  \t   @offset: long\n\t   @down_bytes: long\n       @return dict {\n           'Remote file_id'  : remote_file_id,\n           'Content'         : file_buffer,\n           'Download size'   : downloaded_size,\n           'Storage IP'      : storage_ip\n       }\n  '''\n\n* list_one_group(self, group_name)\n  '''\n  List one group information.\n  arguments:\n       @group_name: string, group name will be list\n       @return Group_info,  instance\n  '''\n\n* list_all_groups(self)\n  '''\n  List all group information.\n       @return dictionary {\n           'Groups count' : group_count,\n           'Groups'       : list of groups\n       }\n  '''\n\n* list_servers(self, group_name, storage_ip = None)\n  '''\n  List all storage servers information in a group\n  arguments:\n       @group_name: string\n       @return dictionary {\n           'Group name' : group_name,\n           'Servers'    : server list,\n       }\n  '''\n\n* get_meta_data(self, remote_file_id)\n  '''\n  Get meta data of remote file.\n  arguments:\n       @remote_fileid: string, remote file id\n       @return dictionary, meta data\n  '''\n\n* set_meta_data(self, remote_file_id, \\\n                      meta_dict, op_flag = STORAGE_SET_METADATA_FLAG_OVERWRITE)\n  '''\n  Set meta data of remote file.\n  arguments:\n       @remote_file_id: string\n       @meta_dict: dictionary\n       @op_flag: char, 'O' for overwrite, 'M' for merge\n       @return dictionary {\n           'Status'     : status,\n           'Storage IP' : storage_ip\n       }\n  '''\n\n* append_by_filename(self, local_filename, remote_fileid)\n  '''\n  Append a file of Storage server\n  arguments:\n       @local_filename: string\n  \t   @remote_fileid: string\n       @return dict {\n           'Group name'      : group_name,\n           'Remote file_id'  : remote_file_id,\n           'Status'          : 'Upload successed.',\n           'Local file name' : '',\n           'Uploaded size'   : upload_size,\n           'Storage IP'      : storage_ip\n       }\n  '''\n\n* append_by_buffer(self, file_buffer, remote_fileid)\n  '''\n  Append a file of Storage server\n  arguments:\n       @file_buffer: string\n  \t   @remote_fileid: string\n       @return dict {\n           'Group name'      : group_name,\n           'Remote file_id'  : remote_file_id,\n           'Status'          : 'Upload successed.',\n           'Local file name' : '',\n           'Uploaded size'   : upload_size,\n           'Storage IP'      : storage_ip\n       }\n  '''\n\n* truncate_file(self, truncated_filesize, appender_fileid)\n  '''\n  Truncate file in Storage server.\n  arguments:\n       @truncated_filesize: long\n       @appender_fileid: remote_fileid\n       @return: dictionary {\n           'Status'     : 'Truncate successed.',\n           'Storage IP' : storage_ip\n       }\n  '''\n\t   \n* modify_by_filename(self, filename, appender_fileid, offset = 0)\n  '''\n  Modify a file in Storage server by filename.\n  arguments:\n       @filename: string, local file name\n       @offset: long, file offset\n       @appender_fileid: string, remote file id\n       @return: dictionary {\n           'Status'     : 'Modify successed.',\n           'Storage IP' : storage_ip\n       }\n  '''\n\n* modify_by_buffer(self, filebuffer, appender_fileid, offset = 0)\n  '''\n  Modify a file in Storage server by buffer.\n  arguments:\n       @filebuffer: string, file buffer\n       @offset: long, file offset\n       @appender_fileid: string, remote file id\n       @return: dictionary {\n           'Status'     : 'Modify successed.',\n           'Storage IP' : storage_ip\n       }\n  '''\n\n### Connection Pools\n\nBehind the scenes, fdfs_client-py uses a connection pool to manage connections to\nsets of tracker server and storage server.\n\n\n## Versioning scheme\n\nfdfs_client-py ver 1.2.7b support client protol of Fastdfs ver 4.06.\nPython must be ver 2.6 later.\n\nAuthor\n------\n\nfdfs_client-py is developed and 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