在 csv 写入期间返回一个字符

Question

我正在尝试将 xls 工作表转换为 CSV 文件。

workbook1 = xlrd.open_workbook(path+'diseaseData.xls')
for sheet in workbook1.sheet_names():
    sh = workbook1.sheet_by_name(sheet)
    csvFile = open('//....../disease-'+sheet+'.csv', 'w')
    wr = csv.writer(csvFile, quoting=csv.QUOTE_ALL)
    for rownum in range(sh.nrows):
        # print (sh.row_values(rownum))
        wr.writerow(sh.row_values(rownum))
    csvFile.close()

它可以工作，但输出的 CSV 文件在每一行之后都有一个空行

"ID","Caption","Sequela type","Visible",""

"infection","Infection","infection","1",""

"acute","Symptomatic infection","acute","1",""

"asymptomatic","Asymptomatic infection","sequela","1",""

"ards_long","Permanent disability due to ARDS","sequela","1",""

"fatalAcute","Fatal cases","sequela","1",""

如何告诉 wr.writerow 它必须覆盖最后一个字符？

我认为这会消除额外的回车 returns。

我尝试了 .strip('\n') 但

AttributeError: 'list' object has no attribute 'strip'

Answer 1

如果列表中的字符串需要从中删除 \n，请使用 strip:

>> a = ["\nfrog", "\ncow", "\nsnake"]
>> print map(str.strip, a)
['frog', 'cow', 'snake']

如果需要从列表中删除 \n，请尝试对单个项目 remove 或对所有项目进行这样的列表理解：

b = [x for x in a if not x == "\n"]

remove有修改原列表的advantage/disadvantage。您可以在列表 while "\n" in list.

上致电 remove

Answer 2

你不需要返回一个字符。只需为 csv 编写器使用 lineterminator 参数。

wr = csv.writer(csvFile, lineterminator='\n')

关于此行为的其他话题，例如here.

在 csv 写入期间返回一个字符

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