将CSV文件中的数字截断到3位小数，同时忽略字符串

import csv

def truncate_csv_numbers(file_path):
    with open(file_path, 'r') as file:
        reader = csv.reader(file)
        rows = list(reader)

    for i in range(len(rows)):
        for j in range(len(rows[i])):
            try:
                number = float(rows[i][j])
                rows[i][j] = "{:.3f}".format(number)
            except ValueError:
                pass

    with open(file_path, 'w', newline='') as file:
        writer = csv.writer(file)
        writer.writerows(rows)