Convert One Touch Expenser export csv to Monas import csv

oneTouch2Monas.py

import csv
from datetime import datetime

with open('expenses.csv','r') as input_csv_file:
    csv_reader =csv.DictReader(input_csv_file,fieldnames=['Date','Amount','Note','Tag'], delimiter=';')
    csv_reader.next()
    with open('monas.csv','w') as output_csv_file:
        output_csv_file.write('"Date (MM/DD/YYYY)","Category","Amount","Note"\n')
        writer = csv.DictWriter(output_csv_file,
            fieldnames=["Date (MM/DD/YYYY)","Category","Amount","Note"],quotechar='"')
        for row in csv_reader:
            parsed_date = datetime.strptime(row['Date'],"%d/%m/%Y")
            row['Date'] = datetime.strftime(parsed_date,"%m/%d/%Y")
            row['Amount'] = str(float(row['Amount']) * -1)
            if not row['Tag']:
            	row['Tag'] = "wasted"
            output_dict = {
                "Date (MM/DD/YYYY)":row['Date'],
                "Category":row['Tag'],
                "Amount":row['Amount'],
                "Note":row['Note']
            }
            writer.writerow(output_dict)