Jupyter 实验室安装/导入包

Question

plotnine我正在尝试为我正在使用的笔记本安装。我做了以下事情：

1. 使用python 3.6创建conda环境，并添加plotnine

2. jupyter lab在激活上述环境的情况下启动

3. 在笔记本中，我添加了以下行： !conda install -c conda-forge --yes plotnine

但是，我的输出没有任何意义。首先它说所有请求的包都已安装，然后它说找不到该模块

!conda install -c conda-forge --yes plotnine
from plotnine import *

Solving environment: done

# All requested packages already installed.

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-386ef81e08ff> in <module>()
     11 get_ipython().system('conda install -c conda-forge --yes plotnine')
     12 ######
---> 13 from plotnine import *     # python clone of ggplot2
     14 matplotlib.rcParams['figure.figsize'] = [12, 8]
     15 matplotlib.rcParams['lines.linewidth'] = 2

ImportError: No module named 'plotnine'

如果存在已知冲突，以下是完整的导入语句：

import gsc # proprietary module
import numpy as np
import matplotlib
import matplotlib.pyplot as plt
import pandas as pd
from ipywidgets import interact, FloatSlider
from util_demo import *
# adding installation of plotnine, which is not included by default
# import sys
!conda install -c conda-forge --yes plotnine
######
from plotnine import *     # python clone of ggplot2
matplotlib.rcParams['figure.figsize'] = [12, 8]
matplotlib.rcParams['lines.linewidth'] = 2
matplotlib.rcParams['xtick.labelsize'] = 24
matplotlib.rcParams['ytick.labelsize'] = 24
matplotlib.rcParams['legend.fontsize'] = 24
matplotlib.rcParams['axes.labelsize'] = 24

---

编辑：我还检查了sys.pathjupyter 笔记本并得到以下内容。我在这里什么也没看到conda。我应该更新PATH还是PYTHONPATH？

['',
 '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python35.zip',
 '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5',
 '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/plat-darwin',
 '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/lib-dynload',
 '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages',
 '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/IPython/extensions',
 '/Users/adamg/.ipython']

Answer 1

我有同样的问题。对我来说，我在 Jupyter Lab 中的笔记本运行的是基础内核，而不是虚拟环境的内核。类型

import sys
sys.executable

进入你的笔记本。对我来说，我得到了结果

'/anaconda3/bin/python'

而不是想要的

'/anaconda3/envs/myenv/bin/python'

我按照iPython 文档中的说明解决了这个问题。总之，您需要为新环境安装新的 iPython 内核。跑步：

'/anaconda3/bin/python'

然后，在新环境中运行 Jupyter Lab：

conda activate myenv
jupyter lab

当您打开新笔记本（也在现有笔记本的右上角）时，您应该能够选择内核“Python (myenv)”。