如何在使用Python读取CSV文件时转义逗号？

Question

我有一些gzip文件是CSV文件。所以我没有使用csv模块。

某些字符字段封装在双引号内："，但不是全部。我的目标是读取行并基本上将数据复制到另一个文件。一些包含双引号的字段中包含逗号，而且我的脚本不能正确忽略引号内的逗号。我如何设置它，使Python忽略双引号内的字符？

这是有关这个问题的部分代码：

with gzip.open('gzippedfile.csv.gz', 'r') as campaign, open('output%s.csv' % today, 'wb') as output: 
     outputwriter = csv.writer(output, delimiter=',') 

    #Create variable 'count' to hold counter to skip reading the header line in the input file 
     count = 0 

     for line in campaign: 
       line=line.replace('\"','') 
       line=line.replace('\'','') 
       #print line 
       #Increment count by one each loop. This will make the loop skip the header line at the first iteration 
       count = count+1 
       if count == 1: 
         continue  
       #print today 
     #Create strings of the campaignid, whitelist entry, blacklist entry, and zipcode list each row 
       campaignid = line.split(',')[0].lstrip() 
       whitelist = line.split(',')[10].lstrip() 
       blacklist = line.split(',')[11] 
       zipcodes = line.split(',')[12] 

我试图消除replace 8号线和9，但这并不解决问题。

Answer 1

为什么不使用csv.reader和gzip.open的文件句柄？

with gzip.open('gzippedfile.csv.gz', 'r') as campaign, open('output%s.csv' % today, 'wb') as output: 
    reader = csv.reader(campaign) # look ma' no manual escaping 
    outputwriter = csv.writer(output, delimiter=',')