导入 quandl 模块时出现问题

Question

我正在尝试使用一些 Quandl 数据集创建数据科学项目，但在导入时收到错误消息。

据我所知，quandl 应该全部以小写形式导入，如文档所述here and ，我的导入如下：

import quandl

错误：

ModuleNotFoundError: No module named 'quandl'

我使用 pip install quandl 安装了 quandl。我的 pip 列表输出是：

Package         Version
--------------- ---------
asn1crypto      0.24.0
certifi         2019.6.16
cffi            1.12.3
chardet         3.0.4
cryptography    2.7
idna            2.8
inflection      0.3.1
more-itertools  5.0.0
ndg-httpsclient 0.5.1
numpy           1.16.4
pandas          0.24.2
pip             19.1.1
pyasn1          0.4.5
pycparser       2.19
pyOpenSSL       19.0.0
python-dateutil 2.8.0
pytz            2019.1
Quandl          3.4.8
requests        2.22.0
setuptools      41.0.1
six             1.12.0
urllib3         1.25.3
wheel           0.33.4
wincertstore    0.2

我没有 pip3，因为我通过 Anaconda 安装 Python。我是运行虚拟环境中的 Jupyter Notebook，我专为此项目创建。你知道，python --version 输出是：

Python 3.7.3

奇怪的部分发生在我尝试运行一行 python 脚本与 import quandl 时。这次程序运行没有报错，也就是说ModuleNotFoundError: No module named 'quandl'的原因是jupyter notebook没有正确找到quandl模块。

作为最后一个资源，我尝试在 jupyter notebook 中安装 quandl：

!pip install quandl
import quandl

输出：

Requirement already satisfied: quandl in c:\users\not_me\.conda\envs\quant\lib\site-packages (3.4.8)
Requirement already satisfied: pandas>=0.14 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (0.24.2)
Requirement already satisfied: pyOpenSSL in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (19.0.0)
Requirement already satisfied: inflection>=0.3.1 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (0.3.1)
Requirement already satisfied: numpy>=1.8 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (1.16.4)
Requirement already satisfied: more-itertools<=5.0.0 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (5.0.0)
Requirement already satisfied: pyasn1 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (0.4.5)
Requirement already satisfied: python-dateutil in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (2.8.0)
Requirement already satisfied: six in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (1.12.0)
Requirement already satisfied: ndg-httpsclient in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (0.5.1)
Requirement already satisfied: requests>=2.7.0 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from quandl) (2.22.0)
Requirement already satisfied: pytz>=2011k in c:\users\not_me\.conda\envs\quant\lib\site-packages (from pandas>=0.14->quandl) (2019.1)
Requirement already satisfied: cryptography>=2.3 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from pyOpenSSL->quandl) (2.7)
Requirement already satisfied: chardet<3.1.0,>=3.0.2 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from requests>=2.7.0->quandl) (3.0.4)
Requirement already satisfied: idna<2.9,>=2.5 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from requests>=2.7.0->quandl) (2.8)
Requirement already satisfied: certifi>=2017.4.17 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from requests>=2.7.0->quandl) (2019.6.16)
Requirement already satisfied: urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from requests>=2.7.0->quandl) (1.25.3)
Requirement already satisfied: asn1crypto>=0.21.0 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from cryptography>=2.3->pyOpenSSL->quandl) (0.24.0)
Requirement already satisfied: cffi!=1.11.3,>=1.8 in c:\users\not_me\.conda\envs\quant\lib\site-packages (from cryptography>=2.3->pyOpenSSL->quandl) (1.12.3)
Requirement already satisfied: pycparser in c:\users\not_me\.conda\envs\quant\lib\site-packages (from cffi!=1.11.3,>=1.8->cryptography>=2.3->pyOpenSSL->quandl) (2.19)
---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-1-614264e6071a> in <module>
      1 get_ipython().system('pip install quandl')
----> 3 import quandl

ModuleNotFoundError: No module named 'quandl'

Answer 1

尝试pip3 install quandl。它通常适用于 Python 3.x

Answer 2

尝试通过运行

安装

!pip install quandl

在 Jupyter notebook 的一个单元格中。如果您的设置正确，则有可能与您需要的 pip 版本相同。

Answer 3

当您想确保使用与该解释器关联的 pip 版本时，您可以使用模块语法而不是独立的 CLI 使用 pip。

python -m pip install quandl

或者，由于您使用的是 Conda，您也可以尝试使用 conda CLI 安装 quandl。

conda install quandl（或 conda 的任何包名）。

Answer 4

问题是 Jupyter 没有正确识别我的虚拟环境。我找到了我的答案 here，解决方法很容易解释。

导入 quandl 模块时出现问题

Problems importing quandl module

python

pip

quandl