无法导入名称ContextualZipFile

Question

这是我尝试安装sqlalchemy时得到的结果

Traceback (most recent call last):
  File "/usr/bin/easy_install", line 11, in <module>
    load_entry_point('setuptools==33.1.1', 'console_scripts', 'easy_install')()
  File "/home/j/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 572, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/home/j/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2755, in load_entry_point
    return ep.load()
  File "/home/j/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2408, in load
    return self.resolve()
  File "/home/j/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2414, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 51, in <module>
    from setuptools.archive_util import unpack_archive
  File "/usr/lib/python2.7/dist-packages/setuptools/archive_util.py", line 12, in <module>
    from pkg_resources import ContextualZipFile
ImportError: cannot import name ContextualZipFile

我尝试过安装和卸载setuptools。

我还尝试在我的usr / local / lib / python2.7 / dist-packages / setuptools / archive_util.py中将“从pkg_resources import ensure_directory，ContextualZipFile”更改为“from pkg_resources import ensure_directory”。但是我得到了错误

Best match: MySQL-python 1.2.5
Processing MySQL-python-1.2.5.zip
Traceback (most recent call last):
  File "/usr/bin/easy_install", line 11, in <module>
    load_entry_point('setuptools==33.1.1', 'console_scripts', 'easy_install')()
  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 2325, in main
    **kw
  File "/usr/lib/python2.7/distutils/core.py", line 151, in setup
    dist.run_commands()
  File "/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 436, in run
    self.easy_install(spec, not self.no_deps)
  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 699, in easy_install
    return self.install_item(spec, dist.location, tmpdir, deps)
  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 725, in install_item
    dists = self.install_eggs(spec, download, tmpdir)
  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 876, in install_eggs
    unpack_archive(dist_filename, tmpdir, self.unpack_progress)
  File "/usr/lib/python2.7/dist-packages/setuptools/archive_util.py", line 53, in unpack_archive
    driver(filename, extract_dir, progress_filter)
  File "/usr/lib/python2.7/dist-packages/setuptools/archive_util.py", line 102, in unpack_zipfile
    with ContextualZipFile(filename) as z:
NameError: global name 'ContextualZipFile' is not defined

我也试过直接导入pkg_resources但它仍然找不到ContextualZipFile。我收到错误：

NameError: global name 'ContextualZipFile' is not defined

我使用python version = 2.7.13和pip version = 9.0.1

我也在虚拟环境中这样做

Answer 1

这是一个非常讨厌的黑客，但我只是评论了导入和easy_install似乎工作正常。将相应的行更改为：

from pkg_resources import ensure_directory#, ContextualZipFile

注意：这是一个系统文件，因此您将不得不使用sudo权限来更改它。你可以使用：sudo vim filename。

这不是一个很好的解决方案，但如果你需要让它匆忙工作，这应该可以解决问题。希望这可以帮助！

Answer 2

这似乎是一个常见的bug https://github.com/pypa/setuptools/issues/252

最简单的方法是使用替代方法，例如：yum -y install python-pip