Question

我最近删除了Anaconda并用brew重新安装了python。我已根据these说明安装了所有内容。

Python效果很好，到目前为止我测试的所有软件包都可以使用。我已经安装了ipython，但尝试从终端启动它会产生：

-bash：ipython：找不到命令

我找到了安装位置：

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

在更早的相关问题之后，我尝试将此路径添加到.bash_profile但得到了：

-bash :: /usr/local/lib/python2.7/site-packages/ipython：没有这样的文件或目录

每当终端开始时。

更多信息：Anaconda安装了一个删除的El-Capitan 10.11.2，python 2.7。

非常感谢任何帮助！

编辑：在@cel请求中添加了更多信息：

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：将python -m pip install ipython的输出添加到cel的请求中：

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"会产生几次点击（包括this SO question），但它们并没有特别帮助。从它的声音来看，你安装了IPython，Python 包，但ipython - 它的包装/启动器 - 因任何原因而丢失。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]:

如果这会带来IPython，那么您可能会尝试创建一个shell别名，因为上面链接的SO答案表明，即在shell的启动脚本中添加类似的内容：alias ipython='python -m IPython'。或者，自己创建启动器脚本。对我而言，它位于/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())

希望这会有所帮助。（如果确实如此，请考虑对其他SO 问题进行投票 ......）

更新：以下是一些可能相关的链接：

Answer 2

如果使用 Python3 ，只需尝试：

ipython3

对我有用。

Answer 3

由@evadeflow给出的答案可以完成这项工作，但是pip还安装了其他几个软件包，为每个软件包继续添加alias将非常不舒服。一种相当优雅的方法是将安装这些软件包的路径添加到$PATH变量中。就我而言，在〜/ .bashrc中添加以下行即可完成工作：

export PATH=$PATH:/home/my_user_name/.local/bin

Addl refs：https://askubuntu.com/q/551990/632996; https://askubuntu.com/q/556090

Answer 4

上面的答案可能足够了，但是我想分享自己的经验，因为我今天遇到了同样的问题并找到了一个简单的解决方案。我在Ubuntu 18.04中安装了ipython use apt，如下所示：

sudo apt安装python-ipython

然后，“ ipython”命令不起作用，并且出现了上面提到的相同的“找不到命令”错误。安装python3-python之后也发生了同样的情况。但是，然后我尝试了“ sudo apt install ipython”并安装了正确的包装器。我不知道pip是否会发生类似的情况，但这就是我使用apt的经验。

Answer 5

有时候，在成功安装anaconda之后，您只需要提供bash_profile。

source ~/.bash_profile

Answer 6

对我有用的是取消使用：

~pip3 uninstall ipython

然后：

~sudo pip3 install ipython

我正在使用Debian在（W10）WSL2上运行它。

Answer 7

对于 anaconda 用户：

conda install -c conda-forge ipywidgets

已安装iPython但未找到

7 个答案: