import requests
input_file=input('filename input file with txt: ')
output_file=input('output filename with txt: ')

good=[]
s=requests.Session()
headers={
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; rv:61.0) Gecko/20100101 Firefox/61.0',
'Accept': '*/*',
'Accept-Language':'ru-RU,ru;q=0.8,en-US'
}
#

with open(input_file, 'r') as f:
    for i in f:
        i=i.replace('\n', '')
        try:
            r=s.get('https://duckduckgo.com', headers=headers, proxies={'http://'+i, 'https://'+i})
            good.append(i)
            print(r)
        except:
            print(i+' bad')

with open(output_file,  'a') as f:
    for i in good:
        f.write(i)