Создать файл, состоящий из строк

import string
import random
n = 5
for i in range(n):
    length = 3
    num = '0123456789'
    rnd_num = list(num)
    random.shuffle(rnd_num)
    num1 = ''.join(rnd_num[:length])
    summ = f'{(random.random() * 900000.00 + 100000.00):.2f}'
    symbols = string.ascii_lowercase
    rnd_symbols = list(symbols)
    random.shuffle(rnd_symbols)
    key = ''.join(rnd_symbols[:length])
    a = num1 + key
    d = [a, summ]
    data = ' '.join(d)
    print(data)
FILENAME = 'data.txt'''.join
with open('data.txt', 'w', encoding='utf-8') as f:
    f.write('\n'.join(data for i in range(n)))

import string
import random
 
n = 5
FILENAME = 'data.txt'
 
with open(FILENAME, 'w', encoding='utf-8') as f:
    rnd_num = list('0123456789')
    rnd_symbols = list(string.ascii_lowercase)
    length = 3
    for i in range(n):
        random.shuffle(rnd_num)
        num = ''.join(rnd_num[:length])
        random.shuffle(rnd_symbols)
        key = ''.join(rnd_symbols[:length])
        sum_ = f' {(random.random() * 900000.00 + 100000.00):.2f}'
        data = num + key + sum_
        print(data)
        f.write(data + '\n')