Issue
I have a txt file with this format:
- 01, Spain
- 02, USA
- 03, India
- 01, Italy
- 01, Portugal
- 04, Brasil
I need to check if the numbers are repeated. In this example, the number "01" has Spain, Italy and Portugal. If two or more lines have the same number, I need to keep only the first of the repeated number and get rid of the others. It would show this in the output file:
- 01, Spain
- 02, USA
- 03, India
- 04, Brasil
Solution
# Read your entire file into memory.
my_file = 'my_file.txt'
with open(my_file) as f_in:
content = f_in.readlines()
# Keep track of the numbers that have already appeared
# while rewriting the content back to your file.
numbers = []
with open(my_file, 'w') as f_out:
for line in content:
number, country = line.split(',')
if not number in numbers:
f_out.write(line)
numbers.append(number)
I hope this is the easiest to understand.
Answered By - Quang Nguyen Answer Checked By - Timothy Miller (PHPFixing Admin)
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