Python AttributeError:'str'对象没有属性'DataFrame'

错误意味着它的内容:

AttributeError: 'str' object has no attribute 'DataFrame' 
      ^           ^                                ^
the kind of error |                                |
       the thing you tried to use      what was missing from it

它抱怨的线:

df = pd.DataFrame(date, columns = ['Date'])
     ^      ^
     |   the attribute the error said was missing
the thing the error said was a string

在我上面添加几行代码之前,一直没有问题

显然,在"上面几行代码"中的某个地方,你导致pd了一个字符串.当然,当我们查看这几行代码时,我们会发现:

pd = PDays[j]
^       ^
|    the string that you're making it into
the thing that you're making a string