Question

我在尝试从csv读取数据时遇到了错误。下面是写入csv的代码，后跟从中读取的代码。 Ubuntu上的Python 2.7。任何帮助表示赞赏！

    #setting up the csv
with open(databaseLocal, 'wb') as csvfile:
        fieldnames = ['cpu', 'pid', 'memory']
        writer = csv.DictWriter(csvfile, fieldnames=fieldnames, 
            quotechar='|', quoting=csv.QUOTE_MINIMAL)
        writer.writeheader()

#Here is one spot where it's written to...
if data[:6] == 'active':
                print 'mem info received'
                memInfo = data[7:-1]

                writer.writerow({'cpu': '_', 'pid': pidValue, 'memory': memInfo})

#and here is where it's read from, there is a KeyError for the line
#where we try to get row['pid]
with open(d, 'rb') as csvfile:
        reader = csv.DictReader(csvfile, delimiter=' ', quotechar='|')
        for row in reader:
            print row['pid']
            print row.keys()

当我打印'row.keys（）'时，所有三个键都出现了。不知道为什么我无法访问'row ['pid']或任何其他人。

谢谢！马特

Answer 1

您正在写信databaseLocal，但正在尝试阅读d。你确定他们引用了同一个文件吗？

Python dictreader KeyError问题

1 个答案: