tarfile compressionerror bz2模块不可用

Question

我正在尝试安装twis​​ted pip install https://pypi.python.org/packages/18/85/eb7af503356e933061bf1220033c3a85bad0dbc5035dfd9a97f1e900dfcb/Twisted-16.2.0.tar.bz2#md5=8b35a88d5f1a4bfd762a008968fddabf

这是一个django-channels项目，我有以下错误问题

Exception:
Traceback (most recent call last):
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/tarfile.py", line 1655, in bz2open
    import bz2
  File "/usr/local/lib/python3.5/bz2.py", line 22, in <module>
    from _bz2 import BZ2Compressor, BZ2Decompressor
ImportError: No module named '_bz2'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/petarp/.virtualenvs/CloneFromGitHub/lib/python3.5/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/site-packages/pip/commands/install.py", line 310, in run
    wb.build(autobuilding=True)
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/site-packages/pip/wheel.py", line 750, in build
    self.requirement_set.prepare_files(self.finder)
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/site-packages/pip/req/req_set.py", line 370, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/site-packages/pip/req/req_set.py", line 587, in _prepare_file
    session=self.session, hashes=hashes)
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/site-packages/pip/download.py", line 810, in unpack_url
    hashes=hashes
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/site-packages/pip/download.py", line 653, in unpack_http_url
    unpack_file(from_path, location, content_type, link)
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/site-packages/pip/utils/__init__.py", line 605, in unpack_file
    untar_file(filename, location)
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/site-packages/pip/utils/__init__.py", line 538, in untar_file
    tar = tarfile.open(filename, mode)
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/tarfile.py", line 1580, in open
    return func(name, filemode, fileobj, **kwargs)
  File "/home/petarp/.virtualenvs/ErasmusCloneFromGitHub/lib/python3.5/tarfile.py", line 1657, in bz2open
    raise CompressionError("bz2 module is not available")
tarfile.CompressionError: bz2 module is not available

显然我缺少bz2模块，所以我试图手动安装它，但这对python 3.5没有用，所以我怎么能解决这个问题呢？

我已经做了@ e4c5建议的但我为python3.5.1做了，输出是

➜  ~ python3.5                               
Python 3.5.1 (default, Apr 19 2016, 22:45:11) 
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import bz2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.5/bz2.py", line 22, in <module>
    from _bz2 import BZ2Compressor, BZ2Decompressor
ImportError: No module named '_bz2'
>>> 
[3]  + 18945 suspended  python3.5
➜  ~ dpkg -S /usr/local/lib/python3.5/bz2.py
dpkg-query: no path found matching pattern /usr/local/lib/python3.5/bz2.py

我在Ubuntu 14.04 LTS上，我从源代码安装了python 3.5。

Answer 1

我的python 3.4安装上的import bz2似乎没有任何问题。所以我做了

import bz2
print (bz2.__file__)

并发现它位于/usr/lib/python3.4/bz2.py然后我做了

dpkg -S /usr/lib/python3.4/bz2.py

这揭示了：

libpython3.4-stdlib：amd64：/usr/lib/python3.4/bz2.py

因此，以下命令应该有希望解决这个问题：

apt-get install libpython3.4-stdlib

更新：

如果你已经从源代码编译了python 3.5，很可能bz2还没有编译好。请先重新安装

./configure --with-libs='bzip' 

这同样适用于python 3.6。请注意，这可能会抱怨其他缺少的依赖项。您将不得不逐个安装缺少的依赖项，直到涵盖所有内容。

Answer 2

我能够通过删除_并将导入更改为来解决此问题

from bz2 import BZ2Compressor, BZ2Decompressor