第三次作业-功能测试

file_name = input("")#在命令行输出
path = "C:\\Users\\Administrator\\Desktop\\" +file_name +‘.txt‘
if not os.path.exists(path):
    print(‘请把目标文件放在桌面‘)
else:
    with open(path,‘r‘,encoding=‘utf-8‘) as f:
        for line in f:
            lines_count = lines_count + 1
            chars_count = chars_count + len(line)
            match = re.findall(r‘[^a-zA-Z0-9]+‘, line)  # 只要英文单词，删掉其他字符
            for i in match:
                line = line.replace(i, ‘ ‘)
                lines_list = line.split()  # 对单词进行统计
            for i in lines_list:
                if i not in words_dict:
                    words_dict[i] = 1
                else:
                    words_dict[i] = words_dict[i] + 1