twint

import twint
# Conseguimos los seguidores
c = twint.Config()
c.Username = "" # Indicar el target
c.Store_object = True
c.User_full = True

twint.run.Followers(c)

# Guardamos en una lista los seguidos
target_followers = twint.output.users_list
# Iteramos en nueva lista
k_followers = []

for user in target_followers:
    if user.followers >= 1000:
        k_followers.append(user)

# Almacenamos los datos en un fichero CSV
with open('k_followers.csv', 'w') as output:
    output.write('id,username,followers, following\n')
    for u in k_followers:
       output.write('{},{},{},{}\n'.format(u.id, u.username, u.followers, u.following))