python - "if"语句查找剩余数字并附加到 csv 列表中

Question

我试图弄清楚如何编写如何从两个列表中查找和附加剩余数字的逻辑。

我有一个 CSV，其数据格式如下

jeffrey,192.168.1.1,example1.com,30220,internet serverice provider 1
mike,192.168.1.2,example2.com,30220,internet service provider 1
frank,192.168.1.3,example3.com,30220,internet service provider 1
lucy,192.168.1.4,example4.com,14619,internet service provider 2
louisa,192.168.1.5,example5.com,14619,internet service provider 2
emily,192.168.1.6,example6.com,3357,internet service provider 3 
john,192.168.1.7,example7.com,210,internet service provider 4

我的列表如下

list_1 = ['3357', '210'] 
list_2 = ['14619'] 
list_3 = [] # List I want that remaining numbers to be in 

我假设使用 if 语句是正确的方法。

类似

import csv

document = file.csv

with open ('test_file', 'w') as output:
        with document as file:
            output_data = csv.writer(output, delimiter = ',')
            reader = csv.reader(file)
            list_1 = ['3357', '210'] 
            list_2 = ['14619'] 
            list_3 = [] # List I want that remaining numbers to be in for row in reader:
               if row[3] not in list_1 and list_2:
                  list_3.append(row[3])
                  print(list_3)

我上面的代码没有得到我想要的结果

30220

非常感谢任何帮助。

Answer 1

如果您可以使用pandas Dataframe，您可以按照以下方式进行

import pandas as pd
df = pd.read_csv('sample.csv', header=None)
list_1 = [3357, 210] 
list_2 = [14619] 
list(set(df[3].tolist()) - set(list_1 + list_2))

输出是 [30220]