Sphinx无法导入常见的Python3软件包

Question

我是Sphinx文档的新手，正在尝试使用此工具为python模块生成自动文档。 我能够部分生成它们，并且出现如下错误：

/home/yash/Music/MailingListParser/bDocs/analysis.author.rst:17: WARNING: autodoc: failed to import module 'analysis.author.curve_fitting'; the following exception was raised:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/sphinx/ext/autodoc.py", line 560, in import_object
    __import__(self.modname)
  File "/home/yash/Music/MailingListParser/lib/analysis/author/curve_fitting.py", line 3, in <module>
    from sklearn.metrics import mean_squared_error
ModuleNotFoundError: No module named 'sklearn'

还有类似的工具，例如plotly，sklearn等。

我正在使用python3和Sphinx 1.5.6。