file.py

import urllib.request
import string

def find_string(string,sub_string):
	return string.find(sub_string)

url = input()

try:
    data = urllib.request.urlopen(url)
except urllib.error.URLError as e: ResponseData = e.read().decode("utf8", 'ignore')
except urllib.error.HTTPError as e: ResponseData = e.read().decode("utf8", 'ignore')


st_code = data.getcode()

directory1= {}
try:
    if st_code == 200:
        sub_string = ".txt"
        res = find_string(url,sub_string)
        if res > 0:
            
            r = data.read().decode('UTF-8')
            
            
            data3 = str(r)
            list1 = data3.split('\n')

            count = 0 
            for line in list1:
                one = line.lower()
                Str2=' '
                for l in one:
                    if l.isalnum():
                        Str2=Str2+l
                    
                count+=1 
                newstr = Str2[1:]
                revstr=newstr[::-1]
                #print("normal  :"+newstr)
                #print("reverse :"+revstr)
                
                if revstr == newstr:
                    #print(newstr)
                    directory1[count]=len(newstr)


            directory1.popitem()
            print(directory1)
            print("File ok")
                
        else:
            print("file is not a text file")
        
        
    else:
        print("the URL is incorrect")
except urllib.error.URLError as e:
    print("error" +e)