Question

我有一个csv文件，前两行的数据为：

Private Async Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

    Dim Hostsystem As SupportSystem
    Dim SF As SendFile

    Try

        SF = db.SendFiles.FirstOrDefault(Function(SFile) SFile.Name = "DailySummary")
        Hostsystem = db.SupportSystems.FirstOrDefault(Function(x) x.Name = SF.SupportSystemName)


        For i = 1 To 1

            Dim TaskSendFile As Task(Of String) = Task(Of String).Factory.StartNew(Function()
                                                                                       Throw New ApplicationException("App Error")
                                                                                       Return ""
                                                                                   End Function)
            Await TaskSendFile

        Next

        MessageBox.Show("All Done")

    Catch ex As Exception
        MessageBox.Show("Error : " + ex.Message)
    Finally
        Try
            **'The below check is what is throwing error.** 
            If Not IsNothing(SF) Then
            End If
        Catch ex As Exception
            MessageBox.Show("Unexpected Error in the finally block. " + ex.StackTrace)
        End Try
    End Try
End Sub

当我使用pandas数据框读取它时：

NewDateTime ResourceName    
9/18/12 1:00    ANACACHO_ANA    
9/18/12 2:00    ANACACHO_ANA

我得到了

df = pd.read_csv(r'MyFile.csv')

然而，当我尝试

时

df1.columns
Index([u'NewDateTime', u'ResourceName', dtype='object')

我收到错误：

df1['NewDateTime']

另外我的pycharm解释器上的df1 [＆＃39; NewDateTime＆＃39;]有一点像df1 [＆＃39; -NewDateTime＆＃39;]，但是当我把它粘贴在这里时，破折号没有＆＃39; t出现

Answer 1

您的CSV文件似乎有BOM (Byte Order Mark) signature，因此请尝试使用'utf-8-sig'，'utf-16'或其他编码与BOM 进行解析：

df = pd.read_csv(r'MyFile.csv', encoding='utf-8-sig')

这是一个小型演示：

In [18]: pd.read_csv(fn).columns
Out[18]: Index([u'?NewDateTime', u'ResourceName'], dtype='object')

In [19]: pd.read_csv(fn, encoding='utf-8-sig').columns
Out[19]: Index([u'NewDateTime', u'ResourceName'], dtype='object')

在我的iPython终端中，BOM签名在?中显示为u'?NewDateTime' - 在您的情况下，它是一个破折号：df1['-NewDateTime']

python pandas在列名中读取csv文件错误

1 个答案: