download.py

import requests,math

import syntax_sugar


def down(url,cp=40):
    ls=int((requests.get(url,headers={"range":"bytes=0-0"}).headers["Content-Range"]).split("/")[1])
    
    lp=math.ceil(ls/cp)
    print(len(range(0,ls,lp)))
    parts=[[i,i+lp-1] for i in range(0,ls,lp)]
    parts[-1][-1]=""
    def try_down(se):
        while 1:
            try:
                return requests.get(url,headers={"range":f"bytes={se[0]}-{se[1]}"}).content
            except Exception:
                pass


    return (syntax_sugar.pipe(parts)|[try_down]*cp|b"".join|syntax_sugar.END)


with open("out","wb") as f:
    f.write(down(input()))