python write a list to a file line by line

1# attempt #1
2f = open("Bills.txt", "w")
3f.write("\n".join(map(lambda x: str(x), bill_List)))
4f.close()
5
6
7# attempt #2
8# Open a file in write mode
9f = open('Bills.txt', 'w')
10for item in bill_List:
11f.write("%s\n" % item)
12# Close opend file
13f.close()
14
15# attempt #3
16
17with open('Bills.txt', 'w') as f:
18for s in bill_List:
19    f.write(s + '\n')
20
21with open('Bills.txt', 'r') as f:
22bill_List = [line.rstrip('\n') for line in f]
23
24# attempt #4
25with open('Bills.txt', 'w') as out_file:
26out_file.write('\n'.join(
27    bill_List))