我创建了一个视图,向作者展示在数据库中用“python”这个词写所有书的作者。我面临的问题是,如果有多个作者,我就什么也不回。这是视图的工作代码,我知道我要么需要使用聚合函数实现子查询(count),要么需要使用EXISTS,但我不知道如何让它工作。
CREATE VIEW sole_python_author(author_first_name, author_last_name)
AS SELECT first_name, last_name
FROM authors, books
WHERE authors.author_id = books.author_id AND
titl
我正在尝试从Anaconda安装一个名为的包。所以我写了这个Dockerfile:
FROM continuumio/miniconda3:latest
RUN conda install -c radiomics pyradiomics
它错误地传达了以下信息:
UnsatisfiableError: The following specifications were found
to be incompatible with the existing python installation in your environment:
Specifications:
- pyradio
我发现作者的PiggybackGAN代码(关于持续学习图像生成)的链接如下:的Github问题有这个问题,但没有人解决。我想在我的Linux环境中运行这段代码。在配置环境和数据集之后,我得到以下错误:
initialize network with normal
initialize network with normal
initialize network with normal
initialize network with normal
Length of loader is 10
learning rate 0.0002000 -> 0.0002000
save image!
我在heroku上创建了一个名为learning logs的应用程序(这是python速成课程中的一个项目).When我试图创建一个超级用户,但它显示了一个错误。 我首先运行(在一个术语中): heroku run bash 然后: python manage.py createsuperuser 主要错误如下: You have 20 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes,
我运行命令
pip install pyqt5
我得到以下错误
~$ pip install pyqt5
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip, can
当我尝试使用pip-3.3安装Pillow时,我得到了一个错误,请参阅下面的回溯。
File "/home/samsun/workspace/python/chat_environment/lib/python3.3/site-packages/pip/req.py", line 297, in egg_info_data
data = fp.read()
File "/home/samsun/workspace/python/chat_environment/lib/python3.3/encodings/ascii.py", line 26,
我试图运行以下代码: ..。
当我运行svn_train.py时,我会得到这个错误
Traceback (most recent call last): File "svhn_train.py", line 93, in
<module>
tf.app.run() File "/Users/n/anaconda/lib/python2.7/site-packages/tensorflow/python/platform/app.py",
line 30, in run
sys.exit(main(sys.argv)) Fi
基本上复制了本教程
然后我使用python manage.py runserver启动服务器(在Win 8中使用cmd提示符)。本地服务器似乎设置得很好。
但是,一旦我尝试加载页面,它就会抛出以下错误:
ImportError at /
No module named google.appengine.api
Request Method: GET
Request URL: http://127.0.0.1:8000/
Django Version: 1.6.5
Exception Type: ImportError
Exception Value:
No module nam