python-2.7 - iPython 已安装但未找到

Question

我最近删除了 Anaconda 并用 brew 重新安装了 python。我已经按照 these 安装了所有东西指示。

Python 工作得很好，到目前为止我测试过的所有包也都可以工作。我已经安装了 ipython，但是尝试从终端启动它会给出:

-bash: ipython: command not found

我在以下位置找到了安装:

/usr/local/lib/python2.7/site-packages/ipython

按照较旧的相关问题，我尝试将此路径添加到 .bash_profile 但得到:

-bash: :/usr/local/lib/python2.7/site-packages/ipython: No such file or directory

每当终端启动。

更多信息:Anaconda 安装了一个已删除的 El-Capitan 10.11.2、python 2.7。

任何帮助将非常感激!

编辑:向@cel 请求添加了更多信息:
echo $PATH给出:

/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/usr/local/git/bin:/Library/TeX/texbin:/Applications/Sublime Text.app/Contents/SharedSupport/bin

which -a python给出: /usr/local/bin/python和 /usr/bin/python .

编辑:添加 python -m pip install ipython 的输出cel的要求:

Requirement already satisfied (use --upgrade to upgrade): ipython in /usr/local/lib/python2.7/site-packages
Requirement already satisfied (use --upgrade to upgrade): traitlets in /usr/local/lib/python2.7/site-packages (from ipython)
Requirement already satisfied (use --upgrade to upgrade): pickleshare in /usr/local/lib/python2.7/site-packages (from ipython)
Requirement already satisfied (use --upgrade to upgrade): simplegeneric>0.8 in /usr/local/lib/python2.7/site-packages (from ipython)
Requirement already satisfied (use --upgrade to upgrade): decorator in /usr/local/lib/python2.7/site-packages (from ipython)
Requirement already satisfied (use --upgrade to upgrade): gnureadline in /usr/local/lib/python2.7/site-packages (from ipython)
Requirement already satisfied (use --upgrade to upgrade): appnope in /usr/local/lib/python2.7/site-packages (from ipython)
Requirement already satisfied (use --upgrade to upgrade): pexpect in /usr/local/lib/python2.7/site-packages (from ipython)
Requirement already satisfied (use --upgrade to upgrade): ipython-genutils in /usr/local/lib/python2.7/site-packages (from traitlets->ipython)
Requirement already satisfied (use --upgrade to upgrade): path.py in /usr/local/lib/python2.7/site-packages (from pickleshare->ipython)
Requirement already satisfied (use --upgrade to upgrade): ptyprocess>=0.5 in /usr/local/lib/python2.7/site-packages (from pexpect->ipython)

Answer 1

在网上搜索 "bash: ipython: command not found"出现了几次点击(包括 this SO question )，但它们并不是特别有用。从它的声音，你有IPython ，安装了 Python 包，但是 ipython ——无论出于何种原因，它的入口点(即包装器/启动器脚本)都不见了。要检查是否是这种情况，请尝试运行:

% python -m IPython
Python 2.7.9 (default, Feb 10 2015, 03:28:08) 
Type "copyright", "credits" or "license" for more information.

IPython 4.0.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]:

如果这带来了 IPython，那么您可以尝试按照上面链接的 SO 答案的建议创建一个 shell 别名，即，在您的 shell 的启动脚本中放置类似的内容: alias ipython='python -m IPython' .或者，自己创建启动程序脚本。对我来说，它住在 /usr/local/bin/ipython并包含以下内容:

#!/usr/local/opt/python/bin/python2.7

# -*- coding: utf-8 -*-
import re
import sys

from IPython import start_ipython

if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
    sys.exit(start_ipython())

希望这可以帮助。 (如果是这样，请考虑对另一个 SO 问题进行投票……)
更新 :这里有一些更可能相关的链接:

ipython: command not found on OSX

https://github.com/pypa/pip/issues/426