django - 使用 csv.reader 读取上传的文件

Question

任务:读取上传的文件以检查结构。我的测试上传文件有 5 行标题和大约 20-30 列。编码为 ISO-8859-1

听起来很简单，但它让我慢慢陷入疯狂。
目前唯一可行的解​​决方案是绕道模型:

file = request.FILES.getlist('job_file', None)[0]
newdoc = models.Jobs(job_file=file)
newdoc.save()
with codecs.open(newdoc.job_file.name, "r", encoding='iso-8859-1') as fp:
    file_content = list(csv.reader(fp, delimiter=';', quotechar='"'))

肮脏，疯狂，远不能接受

非工作解决方案:
1:

file_content = list(csv.reader(file, delimiter=';', quotechar='"'))
print(file_content)
>>>_csv.Error: iterator should return strings, not bytes (did you open the file in text mode?)

2:

file_content = list(csv.reader(file.open('r'), delimiter=';', quotechar='"'))
print(file_content)
>>> TypeError: argument 1 must be an iterator

3:

file_content = list(csv.reader(file.read(), delimiter=';', quotechar='"'))
print(file_content)
>>>_csv.Error: iterator should return strings, not int (did you open the file in text mode?)

一些提示:

print(file.read())
>>>b';"";""\r\n' <-- WRONG see file content at the top
print(file.readlines())
>>>[]

请救救我!

Answer 1

无需打开文件，您可以将上传的文件转换为TextIOWrapper .这是更干净的例子

from io import StringIO

file = request.FILES.getlist('job_file', None)[0]
newdoc = models.Jobs.objects.create(job_file=file)
fp = StringIO(file.read(), encoding='iso-8859-1')
file_content = list(csv.reader(fp, delimiter=';', quotechar='"'))