Receiving this error in my "response" and causes script to return wrong status

[cubangt]

So im trying the last suggestions and having some odd results in the output.. As seen below, that is the format the results are output.
#1 - not sure why or where the newline character is coming from in the dataframe
#2 - not sure why all except for the last site is considered down.. No matter how many sites i have on my list to process, the last one is always UP an everything before it is down.
#

Here is what i see when i write it to a dataframe:

            address  state
0  www.google.com\n      1
1   www.abc13.com\n      1
2   www.yahoo.com\n      1
3     www.cnn.com\n      1
4   www.walmart.com      0
0.17187809944152832

This is what i get when i use the example before dataframe:

www.google.com
,down
www.abc13.com
,down
www.yahoo.com
,down
www.cnn.com
,down
www.walmart.com,up

Here is the code used to produce the newline for each row in the 2nd example:

import time
import subprocess
from concurrent.futures import ThreadPoolExecutor
import pandas as pd

def ping(ip):
    return (
        ip,
        subprocess.run(
            f"ping {ip} -n 1", stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL
        ).returncode,
    )

start = time.time()

with open("ip_list.txt") as file:
    park = file.readlines()
    with ThreadPoolExecutor(4) as executor:
        for result in executor.map(ping, park):
            if result[1] == 0:
           	    f = open("ip_output.txt","a")
           	    f.write(str(result[0]) + ',up' + '\n')
           	    f.close() 
            else:
           	    f = open("ip_output.txt","a")
           	    f.write(str(result[0] + ',down' +'\n'))
           	    f.close()   

This is the dataframe code:

import time
import subprocess
from concurrent.futures import ThreadPoolExecutor
import pandas as pd

def ping(ip):
    return (
        ip,
        subprocess.run(
            f"ping {ip} -n 1", stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL
        ).returncode,
    )

start = time.time()

with open("ip_list.txt") as file:
    park = file.readlines()
 
    executor = ThreadPoolExecutor(4)
    df = pd.DataFrame(executor.map(ping, park), columns=["address", "state"])
    print(df)

If i manually ping the above sites from the command prompt, they are all up and online.