利用python下载scihub成文献为PDF操作

[root@VM_0_9_centos ~]# scihub2pdf -h
usage: scihub2pdf [-h] [--input INPUTFILE] [--title] [--uselibgen]
   [--location LOCATION] [--txt]
 
 SciHub to PDF
 ----------------------------------------------------
 Downloads pdfs via a DOI number, article title
 or a bibtex file, using the database of libgen(sci-hub).
 
 Given a bibtex file
 
 $ scihub2pdf -i input.bib
 
 Given a DOI number...
 
 $ scihub2pdf 10.1038/s41524-017-0032-0
 
 Given a title...
 
 $ scihub2pdf --title An useful paper
 
 Arxiv...
 
 $ scihub2pdf arxiv:0901.2686
 
 $ scihub2pdf --title arxiv:Periodic table for topological insulators
 
 ## Download from list of items
 
 Given a text file like
 
 ```
 10.1038/s41524-017-0032-0
 10.1063/1.3149495
 .....
 ```
 download all pdf's
 ```
 $ scihub2pdf -i dois.txt --txt
 ```
 Given a text file like
 ```
 Some Title 1
 Some Title 2
 .....
 ```
 download all pdf's
 ```
 $ scihub2pdf -i titles.txt --txt --title
 ```
 Given a text file like
 
 ```
 arXiv:1708.06891
 arXiv:1708.06071
 arXiv:1708.05948
 .....
 ```
 download all pdf's
 ```
 $ scihub2pdf -i arxiv_ids.txt --txt
 ```
-----------------------------------------------------
 @author: Bruno Messias
 @email: messias.physics@gmail.com
 @telegram: @brunomessias
 @github: https://github.com/bibcure/sci2pdf
optional arguments:
 -h, --help  show this help message and exit
 --input INPUTFILE, -i INPUTFILE
   bibtex input file
 --title, -t  download from title
 --uselibgen  Use libgen.io instead sci-hub.
 --location LOCATION, -l LOCATION
   folder, ex: -l 'folder/'
 --txt   Just create a file with DOI's or titles