cannot import name 'environmentfilter' from 'jinja2' 问题解决办法

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今晚编译PaddleScience文档，结果报错了，具体如下：

1.cannot import name 'environmentfilter' from 'jinja2'

(p2) PS E:\08.paddle\PaddleScience-develop\docs> .\make.bat
Traceback (most recent call last):
  File "C:\miniconda3\envs\p2\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\miniconda3\envs\p2\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\miniconda3\envs\p2\Scripts\sphinx-build.exe\__main__.py", line 4, in <module>
  File "C:\miniconda3\envs\p2\lib\site-packages\sphinx\cmd\build.py", line 25, in <module>
    from sphinx.application import Sphinx
  File "C:\miniconda3\envs\p2\lib\site-packages\sphinx\application.py", line 43, in <module>
    from sphinx.registry import SphinxComponentRegistry
  File "C:\miniconda3\envs\p2\lib\site-packages\sphinx\registry.py", line 24, in <module>
    from sphinx.builders import Builder
  File "C:\miniconda3\envs\p2\lib\site-packages\sphinx\builders\__init__.py", line 26, in <module>
    from sphinx.util import import_object, logging, progress_message, rst, status_iterator
  File "C:\miniconda3\envs\p2\lib\site-packages\sphinx\util\rst.py", line 21, in <module>
    from jinja2 import Environment, environmentfilter
ImportError: cannot import name 'environmentfilter' from 'jinja2' (C:\miniconda3\envs\p2\lib\site-packages\jinja2\__init__.py)
(p2) PS E:\08.paddle\PaddleScience-develop\docs>

感觉好纳闷啊啊啊，通过百度，据悉是jinja2版本过高，哭晕了。

pip list发现 jinja2版本为3.1.2

Jinja2                        3.1.2

于是乎降级先

pip install jinja2==2.10.1

2.ImportError: cannot import name 'soft_unicode' from 'markupsafe'

结果继续报错

(p2) PS E:\08.paddle\PaddleScience-develop\docs> .\make.bat
Traceback (most recent call last):
  File "C:\miniconda3\envs\p2\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\miniconda3\envs\p2\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\miniconda3\envs\p2\Scripts\sphinx-build.exe\__main__.py", line 4, in <module>
  File "C:\miniconda3\envs\p2\lib\site-packages\sphinx\cmd\build.py", line 25, in <module>
    from sphinx.application import Sphinx
  File "C:\miniconda3\envs\p2\lib\site-packages\sphinx\application.py", line 32, in <module>
    from sphinx.config import Config
  File "C:\miniconda3\envs\p2\lib\site-packages\sphinx\config.py", line 27, in <module>
    from sphinx.util.tags import Tags
  File "C:\miniconda3\envs\p2\lib\site-packages\sphinx\util\tags.py", line 11, in <module>
    from jinja2 import nodes
  File "C:\miniconda3\envs\p2\lib\site-packages\jinja2\__init__.py", line 33, in <module>
    from jinja2.environment import Environment, Template
  File "C:\miniconda3\envs\p2\lib\site-packages\jinja2\environment.py", line 15, in <module>
    from jinja2 import nodes
  File "C:\miniconda3\envs\p2\lib\site-packages\jinja2\nodes.py", line 19, in <module>
    from jinja2.utils import Markup
  File "C:\miniconda3\envs\p2\lib\site-packages\jinja2\utils.py", line 647, in <module>
    from markupsafe import Markup, escape, soft_unicode
ImportError: cannot import name 'soft_unicode' from 'markupsafe' (C:\miniconda3\envs\p2\lib\site-packages\markupsafe\__init__.py)

继续降级

pip install markupsafe==1.1.1