Question

我试图在Python 3中运行名为msgpack_checker.py的以下脚本：

import msgpack
from faker import Faker
import logging
from logging.handlers import RotatingFileHandler

fake = Faker()
fake.seed(0)

data_file = "my_log.log"

logger = logging.getLogger('my_logger')
logger.setLevel(logging.DEBUG)
handler = RotatingFileHandler(data_file, maxBytes=2000, backupCount=10)
handler.terminator = ""         # Suppress the newline character (only works in Python 3)
logger.addHandler(handler)

fake_dicts = [{'name': fake.name()} for _ in range(100)]

for item in fake_dicts:
    dump_string = msgpack.packb(item)
    # print dump_string
    logger.debug(dump_string)

unpacker = msgpack.Unpacker(open(data_file))

print("Printing unpacked contents:")
for unpacked in unpacker:
    print(unpacked)

当我使用Python 2运行它时，它会打印以下输出：

Printing unpacked contents:
{'name': 'Joshua Carter'}
10
{'name': 'David Williams'}
10
{'name': 'Joseph Jones'}
10
{'name': 'Gary Perry'}
10
{'name': 'Terry Wells'}
10
{'name': 'Vanessa Cooper'}
10
{'name': 'Michael Simmons'}
10
{'name': 'Nicholas Kline'}
10
{'name': 'Lori Bennett'}
10

数字＆＃34; 10＆＃34;我相信来自记录器，应该通过handler.terminator = ""命令在Python 3中删除。但是，如果我尝试使用python3 msgpack_checker.py运行脚本，则会收到以下错误：

Traceback (most recent call last):
  File "msgpack_checker.py", line 3, in <module>
    import logging
  File "/home/kurt/Documents/Scratch/logging/__init__.py", line 26, in <module>
    import sys, os, time, cStringIO, traceback, warnings, weakref
ImportError: No module named 'cStringIO'

显然，logging模块会尝试直接导入cStringIO，而Python 3中已不再存在该模块。我已经看到了涉及从StringIO导入io的修复程序而不是StringIO，但我不确定他们会在这里工作。关于如何让这个脚本在Python 3中工作的任何建议？

Answer 1

正如几条评论所指出的，我不小心将目录logging留在同一目录中，这是错误消息所指的内容。删除该目录后，我收到一条不同的错误消息，

Printing unpacked contents:
Traceback (most recent call last):
  File "msgpack_checker.py", line 27, in <module>
    for unpacked in unpacker:
  File "msgpack/_unpacker.pyx", line 459, in msgpack._unpacker.Unpacker.__next__ (msgpack/_unpacker.cpp:459)
  File "msgpack/_unpacker.pyx", line 380, in msgpack._unpacker.Unpacker._unpack (msgpack/_unpacker.cpp:380)
  File "msgpack/_unpacker.pyx", line 370, in msgpack._unpacker.Unpacker.read_from_file (msgpack/_unpacker.cpp:370)
TypeError: expected bytes, str found

但这是一个单独的问题;至少导入logging是成功的。

如何解决＆＃34;没有命名的模块＆＃39; cStringIO＆＃39;＆＃34;在Python 3中导入日志记录模块时

1 个答案: