如何根据不同的日期列查找csv文件的最小值和最大值？

import csv
from datetime import datetime

def find_min_max(csv_file, date_column):
    min_date = None
    max_date = None

    with open(csv_file, 'r') as file:
        reader = csv.reader(file)
        header = next(reader)  # Skip header row

        date_index = header.index(date_column)

        for row in reader:
            date_str = row[date_index]
            date_obj = datetime.strptime(date_str, '%Y-%m-%d')  # Assuming date format is YYYY-MM-DD

            if min_date is None or date_obj < min_date:
                min_date = date_obj

            if max_date is None or date_obj > max_date:
                max_date = date_obj

    return min_date, max_date

# Example usage
csv_file = 'data.csv'
date_column = 'Date'

min_date, max_date = find_min_max(csv_file, date_column)
print('Minimum date:', min_date.strftime('%Y-%m-%d'))
print('Maximum date:', max_date.strftime('%Y-%m-%d'))