add member

from telethon.sync import TelegramClient
from telethon.tl.functions.messages import GetDialogsRequest
from telethon.tl.types import InputPeerEmpty, InputPeerChannel, InputPeerUser
from telethon.errors.rpcerrorlist import PeerFloodError, UserPrivacyRestrictedError
from telethon.tl.functions.channels import InviteToChannelRequest
import sys
import csv
import traceback
import time

api_id = <your_API_id>
api_hash = '<your_API_hash>'
phone = '<your_phone_number>'
client = TelegramClient(phone, api_id, api_hash)

client.connect()
if not client.is_user_authorized():
    client.send_code_request(phone)
    client.sign_in(phone, input('Enter the code: '))

input_file = sys.argv[1]
users = []
with open(input_file, encoding='UTF-8') as f:
    rows = csv.reader(f,delimiter=",",lineterminator="\n")
    next(rows, None)
    for row in rows:
        user = {}
        user['username'] = row[0]
        user['id'] = int(row[1])
        user['access_hash'] = int(float(row[2])) # changing something in data type
        user['name'] = row[3]
        users.append(user)

chats = []
last_date = None
chunk_size = 200
groups=[]

result = client(GetDialogsRequest(
             offset_date=last_date,
             offset_id=0,
             offset_peer=InputPeerEmpty(),
             limit=chunk_size,
             hash = 0
         ))
chats.extend(result.chats)

for chat in chats:
    try:
        if chat.megagroup== True:
            groups.append(chat)
    except:
        continue

print('Choose a group to add members:')
i=0
for group in groups:
    print(str(i) + '- ' + group.title)
    i+=1

g_index = input("Enter a Number: ")
target_group=groups[int(g_index)]

target_group_entity = InputPeerChannel(target_group.id,target_group.access_hash)

mode = int(input("Enter 1 to add by username or 2 to add by ID: "))
i = 1 #testing numbering
for user in users:
    
    try:
        print ("{}. Adding {}".format(i, user['id'])) # this location "i"
        if mode == 1:
            if user['username'] == "":
                continue
            user_to_add = client.get_input_entity(user['username'])
        elif mode == 2:
            user_to_add = InputPeerUser(user['id'], user['access_hash'])
        else:
            sys.exit("Invalid Mode Selected. Please Try Again.")
        client(InviteToChannelRequest(target_group_entity,[user_to_add]))
        print("Waiting 60 Seconds...")
        time.sleep(20) #sleep 900 instead 60
        i = i + 1   # this location increases counting unit
    except PeerFloodError:
        print("Getting Flood Error from telegram. Script is stopping now. Please try again after some time.")
    except UserPrivacyRestrictedError:
        print("The user's privacy settings do not allow you to do this. Skipping.")
    except:
        traceback.print_exc()
        print("Unexpected Error")
        continue