Question

当我使用python2.7运行我的Jupyter-notebook并尝试使用for循环打印项目（列表）时，导入以下软件包后不会输出print语句：

     public function actionCreate()
    {
        $model = new Answer();
        var_dump(Yii::$app->request->post());`enter code here`
        if ($model->load(Yii::$app->request->post()) && $model->validate()) {
            $model->answer_by= \Yii::$app->user->getId();
            $name = $model->answer_attachment;
            var_dump($name);
            $model->answer_attachment = UploadedFile::getInstanceByName('btn.jpg');
            var_dump($model->answer_attachment);
             $time=time();
            if(!empty($model->answer_attachment)){
                $model->answer_attachment->saveAs('images/answer/'.$time.'.'.$model->answer_attachment->extension);
                $model->answer_attachment='images/answer/'.$time.'.'.$model->answer_attachment->extension;
            }
            $model->answer_timestamp=$time;
            //$model->save();
            //return $this->redirect(['view', 'id' => $model->answer_id]);
        } else {
            return $this->render('create', [
                'model' => $model,
            ]);
        }
    }

示例代码：

import sys
import os
from hachoir_core.cmd_line import unicodeFilename
from hachoir_metadata import extractMetadata
from hachoir_parser import createParser
from hachoir_core.i18n import getTerminalCharset
from hachoir_core.tools import makePrintable
import pandas as pd

输出为空白。

当我在导入之前使用完全相同的代码时，它会显示。

看起来hachoir导入是个问题，每当我导入包含它的任何东西时，输出就会停止显示。

Answer 1

重新发布答案：hachoir_metadata模块似乎对stdout做了一些奇怪的事情，它破坏了IPython：Bug report。

如该链接所述，您需要在导入hachoir_metadata之前添加以下代码：

from hachoir_core import config config.unicode_stdout = False

jupyter-notebook输出for循环没有显示

1 个答案: