計數實例文件，如果我從op.itemgetter刪除運算

Question

import re, csv 
import os,shutil 
import io,json, collections 
from collections import Counter, defaultdict,deque 

sn=0 #1st column 
p_f=1 #2nd column 


reader = csv.reader(open("C:/Users/gurbir.sahota/Documents/python_csv_file_program/remove_duplicates.csv", "r"), delimiter='\t') 


f= csv.writer(open("C:/Users/gurbir.sahota/Documents/python_csv_file_program/final.csv", "w")) 


g=open("C:/Users/gurbir.sahota/Documents/python_csv_file_program/remove_duplicates.csv",'r') 
with open("C:/Users/gurbir.sahota/Documents/python_csv_file_program/remove_duplicates.csv", 'r') as infh: 
    data = csv.reader(infh) 
    next(data) # skip header 

    seen = defaultdict(set) 

    counts = Counter(
    row[sn]  
    for row in data 
    if row[sn] and row[p_f] not in seen[row[sn]] and not seen[row[sn]].add(row[sn]) 
    ) 


print(counts.most_common()) 
#want to count instances of the number 2 in [('VFGRP15040030', 2), ('VFGRP15370118', 2), ('VFGRP15150113', 2)] 


x=len(list(csv.reader(open('C:/Users/gurbir.sahota/Documents/python_csv_file_program/remove_duplicates.csv')))) 
print('# of rows including header=');print(x) 
count_pass = sum(1 for row in csv.reader(open('C:/Users/gurbir.sahota/Documents/python_csv_file_program/remove_duplicates.csv')) if row[1] =='pass') 
print('# of passes=');print(count_pass) 

count_fail = sum(1 for row in csv.reader(open('C:/Users/gurbir.sahota/Documents/python_csv_file_program/remove_duplicates.csv')) if row[1] =='fail') 
print('# of fails=');print(count_fail) 

#count_retest = ?? 




g.close 
#f.close 

Answer 1

# to get duplicates and their frequency for a column 
from collections import Counter 
from operator import itemgetter 

with open('data.csv', 'r', newline='') as f: 
    r = csv.reader(f) 
    # here we take as example column number 1 
    cn = Counter(map(itemgetter(1), r)) 
    # print item that appears more than once in the column 
    for k, v in cn.items(): 
     if v > 1: 
      print(k,v)