IPython报错：pkg_resources.DistributionNotFound: gnureadline_python raise distributionnotfound(req, requirers)-优快云博客

本文链接：https://blog.youkuaiyun.com/bianer199/article/details/39892105

在OS X 10.9.5系统上，使用Python 2.7.8时遇到了IPython启动时报pkg_resources.DistributionNotFound: gnureadline的错误。通过在终端中重新安装所有pip包，可以解决这个问题。执行相关命令后，再次运行ipython即可成功进入ipython shell。

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环境：系统OS X 10.9.5 Python 2.7.8

利用pip安装Ipython

pip install ipython

运行ipython报错：

<span style="font-family:Microsoft YaHei;font-size:14px;">Traceback (most recent call last):
  File "/usr/local/bin/ipython", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 2603, in <module>
    working_set.require(__requires__)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 666, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 565, in resolve
    raise DistributionNotFound(req)  # XXX put more info here
pkg_resources.DistributionNotFound: gnureadline</span>

解决：

在terminal中type如下命令。

export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments
sudo -E pip install ipython[all] --force --upgrade

将会将所有重新安装。

执行完毕后再次type ipython，即可进入ipython shell。