python - Jupyter 实验室安装/导入包

Question

我正在尝试为我正在使用的笔记本安装 plotnine。我做了以下事情:

1. 使用 python 3.6 创建了一个 conda 环境，并添加了 plotnine

2. 在激活上述环境的情况下启动 jupyter lab

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


但是，我的输出毫无意义。首先它说所有请求的包都已安装，然后它说找不到模块

!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，这里是完整的导入语句:

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:我还在 jupyter notebook 中检查了 sys.path 并获得以下内容。我在这里没有看到任何关于 conda 的信息。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

我遇到了同样的问题。对我来说，我在 Jupyter Lab 中的笔记本运行的是基本内核，而不是虚拟环境的内核。类型

import sys
sys.executable

记入你的笔记本。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 documentation 中的说明解决了这个问题.总之，您需要为您的新环境安装一个新的 iPython 内核。运行:

conda install -n myenv ipython
conda activate myenv
python -m ipykernel install --user --name myenv --display-name "Python (myenv)"

然后，在新环境中运行 Jupyter Lab:

conda activate myenv
jupyter lab

当您打开一个新笔记本时(也在现有笔记本的右上角)，您应该能够选择内核“Python (myenv)”。