在python中高效地从20000行的csv文件中查找最大相关值

import csv

def find_max_correlation(csv_file):
    max_correlation = 0.0
    with open(csv_file, 'r') as file:
        reader = csv.reader(file)
        next(reader)  # 跳过标题行
        for row in reader:
            correlation = float(row[2])  # 假设相关值在第三列
            if correlation > max_correlation:
                max_correlation = correlation
    return max_correlation

csv_file = 'path/to/your/csv/file.csv'
max_correlation = find_max_correlation(csv_file)
print("最大相关值为:", max_correlation)