比较两个CSV文件，并打印在不同的Python

Question

我想比较两个能像下面

English.csv 
i 
am 
is 
was 
were 

Dictionary.csv 
i,insomnia 
d,disease 
bc,breast cancer 

我想第一列中比较两个文件和打印的CSV文件中的行如下所示的不同于Dictionary.csv的行

final.csv 
d,disease 
bc,breast cancer 

我试过这段代码。

import csv 
with open('English.csv', 'rb') as csvfile1: 
    with open ("Dictionary.csv", "rb") as csvfile2: 
     reader1 = csv.reader(csvfile1) 
     reader2 = csv.reader(csvfile2) 
     rows1 = [row for row in reader1] 
     rows2 = [row for row in reader2] 
     col_a = [row1[0] for row1 in rows1] 
     col_b = [row2[0] for row2 in rows2] 
     col_c = [row2[1] for row2 in rows2] 
     only_b = [text for text in col_b if not text in col_a] 

我可以从第一列中得到不同的数据，但不是像下面这样的第二列。我如何从第二栏中获取相应的数据？

>>>only_b 
['d','bc'] 

Answer 1

不知道如何有效的就是这一点，但IMO你想要做什么：

import csv 
with open('English.csv', 'rb') as csvfile1: 
    with open ("Dictionary.csv", "rb") as csvfile2: 
     reader1 = csv.reader(csvfile1) 
     reader2 = csv.reader(csvfile2) 
     rows1_col_a = [row[0] for row in reader1] 
     rows2 = [row for row in reader2] 
     only_b = [] 
     for row in rows2: 
      if row[0] not in rows1_col_a: 
       only_b.append(row) 
     print only_b 

输出：

[['d', 'disease'], ['bc', 'breast cancer']]