内容相关版本冲突错误，Google Colab

Question

我正在尝试在Google colab上安装并运行sunpy。它需要软件包astropy 3.1或更高版本。即使在安装astropy版本3.2.1之后，当我导入sunpy时，它也会出现以下错误：

ContextualVersionConflict     Traceback (most recent call last)
 <ipython-input-10-1a62dedba559> in <module>()
   ----> 1 import sunpy

5 frames
/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py in 
resolve(self, requirements, env, installer, replace_conflicting, 
extras)
789                 # Oops, the "best" so far conflicts with a 
dependency
790                 dependent_req = required_by[req]
--> 791                 raise VersionConflict(dist, 
req).with_context(dependent_req)
792 
793             # push the new requirements onto the stack

ContextualVersionConflict: (astropy 3.0.5 
(/usr/local/lib/python3.6/dist-packages), 
Requirement.parse('astropy>=3.1'), {'sunpy'})

点列表给出以下结果：

Package                  Version              
------------------------ ---------------------
absl-py                  0.8.0                
aioftp                   0.13.0               
aiohttp                  3.6.1                
alabaster                0.7.12               
albumentations           0.1.12               
altair                   3.2.0                
astor                    0.8.0                
astropy                  3.2.1 

该如何解决？

Answer 1

手动安装astropy >= 3.1，就像在日落之前一样：

!pip install astropy>=3.1
!pip install sunpy

然后，使用Runtime-> Restart runtime菜单重新启动运行时以拾取新的星号。最后，导入sunpy。

这是一个可行的示例： https://colab.research.google.com/drive/1741JFtJPq37S8oEzjzvANFWBbH3rQ4Oc