将列表转换为格式化的字符串，然后以所述格式将字符串写入文本文件

Question

I need to convert a list into a string which I want to format as follows:

Enter your Account Number: 1
l 0.0 l
2 0.0 2
3 0.0 3
4 0.0 4

I then want to write that string into a text file keeping the same format.

account= ["a1", "a2", "a3"]
balance= ["b1", "b2", "b3"]
names= ["n1", "n2", "n3"]

length = len(account)

i = 0
for i in range(i, length):
    new_list = ''.format(account[i] + " " + balance[i] + " " + names[i])
    print(new_list)
    i += 1
string = new_list

data_file = open("bank.txt", 'a')
data_file.write(str(string))
data_file.close()

If I print the string, it prints out in the right format, but only the last line of the string is written to the text file.

Answer 1

Code:

account= ["a1", "a2", "a3"]
balance= ["b1", "b2", "b3"]
names= ["n1", "n2", "n3"]

length = len(account)
data_file = open("bank.txt", 'w')

for i in range(length):
    new_list = '{} {} {}\n'.format(account[i], balance[i], names[i])
    data_file.write(new_list)
data_file.close()