DictReader错误:预期的字符串或Unicode对象，找到列表 [英] DictReader error: expected string or Unicode object, list found

问题描述

我正在尝试阅读具有以下权限的Google表格文档:

I am trying to read a google sheet document with permissions like this:

    opener = urllib2.build_opener()
    opener.addheaders = [('Accept-Charset', 'utf-8')]
    response = opener.open(
       "https://docs.google.com/spreadsheets/d/ID/export?format=csv"
    )
    csv_records = unicodecsv.reader(response, encoding='utf-8')
    translations = csv.DictReader(csv_records) 
    for row in translations:
       print row["age"]

但是，我得到一个错误:expected string or Unicode object, list found可能是字段名称.

however, I get an error : expected string or Unicode object, list found probably for the fieldnames.

怎么了?

堆栈跟踪:

  File "/Users/me/projects/ad_copy.py", line 68, in create_copies
    for row in translations
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/csv.py", line 107, in next
    self.fieldnames
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/csv.py", line 90, in fieldnames
    self._fieldnames = self.reader.next()
TypeError: expected string or Unicode object, list found

打印

print translations
print csv_records
<csv.DictReader instance at 0x11163fa28>
<unicodecsv.py2.UnicodeReader object at 0x11160da50>

推荐答案

据我了解，unicodecsv返回一个列表，以您的情况为csv_records.

As far as I understand, unicodecsv returns a list, in your case csv_records.

这取自 github自述文件:

>>> import unicodecsv as csv
>>> from io import BytesIO
>>> f = BytesIO()
>>> w = csv.writer(f, encoding='utf-8')
>>> _ = w.writerow((u'é', u'ñ'))
>>> _ = f.seek(0)
>>> r = csv.reader(f, encoding='utf-8')
>>> next(r) == [u'é', u'ñ']
True

最后看一下比较.

您将此返回列表放入csv.DictReader()，这是不必要的，因为结果已经在csv_records之内.

You put this returned list into a csv.DictReader(), which is not necessary, since the result already is within csv_records.

打印出此变量，看看里面有什么.

Print out this variable, see what is inside.

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