如何替换平面文件中特定位置的字符

def replace_character(file_path, line_number, column_number, new_character):
    with open(file_path, 'r') as file:
        lines = file.readlines()

    # 确保行和列的索引在有效范围内
    if line_number > 0 and line_number <= len(lines) and column_number > 0:
        line = lines[line_number - 1]  # 行索引从1开始
        if column_number <= len(line):
            # 将指定位置的字符替换为新字符
            new_line = line[:column_number - 1] + new_character + line[column_number:]
            lines[line_number - 1] = new_line

    with open(file_path, 'w') as file:
        file.writelines(lines)

# 示例用法
replace_character('path/to/file.txt', 3, 7, 'X')