pdfminer package: can't find exgtract_text function

[Pavel_47]

Output:
pavel@ALABAMA:~$ pip3 install pdfminer.six
Defaulting to user installation because normal site-packages is not writeable
Collecting pdfminer.six
  Downloading pdfminer.six-20201018-py3-none-any.whl (5.6 MB)
     |████████████████████████████████| 5.6 MB 3.5 MB/s 
Requirement already satisfied: chardet in ./.local/lib/python3.6/site-packages (from pdfminer.six) (3.0.4)
Requirement already satisfied: cryptography in ./.local/lib/python3.6/site-packages (from pdfminer.six) (2.9)
Requirement already satisfied: sortedcontainers in ./.local/lib/python3.6/site-packages (from pdfminer.six) (2.1.0)
Requirement already satisfied: cffi!=1.11.3,>=1.8 in ./.local/lib/python3.6/site-packages (from cryptography->pdfminer.six) (1.14.0)
Requirement already satisfied: six>=1.4.1 in ./.local/lib/python3.6/site-packages (from cryptography->pdfminer.six) (1.12.0)
Requirement already satisfied: pycparser in ./.local/lib/python3.6/site-packages (from cffi!=1.11.3,>=1.8->cryptography->pdfminer.six) (2.20)
Installing collected packages: pdfminer.six
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
textract 1.6.3 requires beautifulsoup4==4.8.0, but you have beautifulsoup4 4.8.1 which is incompatible.
textract 1.6.3 requires pdfminer.six==20181108, but you have pdfminer-six 20201018 which is incompatible.
Successfully installed pdfminer.six-20201018
pavel@ALABAMA:~$ 

Concerning Error message:

1. Should I change beautifulsoup4 4.8.1 to beautifulsoup4 4.8.0 ?
   
2. Should I install 20181108 instead of 20201018 ?