1 with open('X:/XXX/XXX/XXX/data.txt',encoding = "utf-8-sig") as file:
 2     #上一行的参数！只使用'r'会出现报错：'gbk' codec can't decode byte 0xb7 in position 8: illegal multibyte sequence，输入encoding='utf-8'可解决
 3     #只使用"utf-8"输出时会出现文件第一行多出十六进制编码，用'-sig'解决。
 4     data_line = file.readline()
 5     data_line = data_line.replace('\t',',')
 6     data_line = data_line.strip('\n')
 7     keys = data_line.split(',')
 8  
 9  
10     values_wet = set()                      #set()是创建空集合的唯一方法
11     values_dry = set()
12     values_harm = set()
13     values_re = set()
14  
15      
16     while True:
17         data_line = file.readline()
18         if data_line != '':                 #解决最后一行问题，注意要加else: break，不然死循环
19             data_line = data_line.strip('\n')
20             data_line = data_line.replace('\t',',')
21             values = data_line.split(',')
22             values_wet.add(values[1])       #添加值到集合，".add()"方法
23             values_dry.add(values[2])
24             values_harm.add(values[3])
25             values_re.add(values[4])
26         else:
27             break
28  
29  
30 dic = {keys[1]:values_wet, keys[2]:values_dry, keys[3]:values_harm, keys[4]:values_re}
31  
32  
33 #定义函数判断values属于哪个key
34 def get_key(value,dict=dic):
35     return [k for k,v in dict.items() if value in v]    #列表解析式
36  
37  
38 #输出
39 value1 = input('Enter the thing:')
40 print(get_key(value1))