从BytesIO解压缩bz2文件

Question

I want to read a bz2 file in a server, decompress it and read with csv parser, but I still have the error;

    myfile = bz2.BZ2File(bio.read(), "rb")
TypeError: file() argument 1 must be encoded string without NULL bytes, not str

import paramiko
from config import config
import bz2
import csv
import StringIO
from io import BytesIO
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(config.get('mrc_ssh', 'host'), username=config.get('mrc_ssh', 'user'))
sftp_client = ssh.open_sftp()
_file = sftp_client.open('/home/myfile.bz2')
bio = BytesIO(_file.read())
print bio
myfile = bz2.BZ2File(bio.read(), "rb")
reader = csv.DictReader(myfile)
for row in reader:
    print row

Answer 1

bz2.BZ2File takes a filename as the first argument. Not actual data.

Either use (if you can store locally the file):

myfile = bz2.BZ2File('/home/myfile.bz2', "rb")

Or use the one-shot decompression function bz2.decompress

uncompressed_data = bz2.decompress(bio.read())