我需要删除CSV行中的空格，然后在指定的字符位置添加逗号

import csv

def process_csv(file_path, position):
    with open(file_path, 'r') as file:
        csv_reader = csv.reader(file)
        lines = list(csv_reader)

    for i in range(len(lines)):
        line = lines[i]
        line = line.replace(" ", "")  # 删除空格
        line = line[:position] + ',' + line[position:]  # 添加逗号
        lines[i] = line

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

# 调用示例
csv_file_path = 'example.csv'
character_position = 5
process_csv(csv_file_path, character_position)