logo标签列表

为什么IPython QtConsole无法启动？

pythonqtpyqtipython
5

我已经按照安装页面上的描述使用'pip install ipython[all]'安装了ipython，并且还使用homebrew安装了qtconsole所需的依赖项(qt、pyqt和sip)。但是，当我尝试在终端中使用'ipython qtconsole'启动qtconsole时，我收到以下错误消息：

Traceback (most recent call last):
  File "/Users/***/.virtualenvs/data-analysis/bin/ipython", line 11, in <module>
   sys.exit(start_ipython())
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/__init__.py", line 120, in start_ipython
return launch_new_instance(argv=argv, **kwargs)
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/config/application.py", line 563, in launch_instance
app.initialize(argv)
  File "<string>", line 2, in initialize
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/config/application.py", line 92, in catch_config_error
    return method(app, *args, **kwargs)
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/terminal/ipapp.py", line 321, in initialize
    super(TerminalIPythonApp, self).initialize(argv)
  File "<string>", line 2, in initialize
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/config/application.py", line 92, in catch_config_error
    return method(app, *args, **kwargs)
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/core/application.py", line 381, in initialize
 self.parse_command_line(argv)
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/terminal/ipapp.py", line 316, in parse_command_line
    return super(TerminalIPythonApp, self).parse_command_line(argv)
  File "<string>", line 2, in parse_command_line
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/config/application.py", line 92, in catch_config_error
    return method(app, *args, **kwargs)
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/config/application.py", line 475, in parse_command_line
    return self.initialize_subcommand(subc, subargv)
  File "<string>", line 2, in initialize_subcommand
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/config/application.py", line 92, in catch_config_error
    return method(app, *args, **kwargs)
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/config/application.py", line 406, in initialize_subcommand
    subapp = import_item(subapp)
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/utils/importstring.py", line 42, in import_item
    module = __import__(package, fromlist=[obj])
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/qt/console/qtconsoleapp.py", line 58, in <module>
    from IPython.external.qt import QtCore, QtGui
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/external/qt.py", line 23, in <module>
    QtCore, QtGui, QtSvg, QT_API = load_qt(api_opts)
  File "/Users/***/.virtualenvs/data-analysis/lib/python2.7/site-packages/IPython/external/qt_loaders.py", line 258, in load_qt
api_options))
ImportError: 
Could not load requested Qt binding. Please ensure that
PyQt4 >= 4.7 or PySide >= 1.0.3 is available,
and only one is imported per session.

Currently-imported Qt library:   None
PyQt4 installed:                 False
PySide >= 1.0.3 installed:       False
Tried to load:                   ['pyside', 'pyqt']

这里出了什么问题？非常感谢您的帮助。
注意：类似这个问题的解决方法在这里（https://dev59.com/9YPba4cB1Zd3GeqPpT38?rq=1）。该主题以及下面的评论（感谢jihun！）建议将“export PYTHONPATH=/usr/local/lib/python2.7/site-packages:$PYTHONPATH”添加到.bash_profile中，以解决此问题。 - thereislight
1
有用的提示：“如何在Windows上安装PyQt4”，请参见此处 - https://dev59.com/E2Eh5IYBdhLWcg3wPhZT - Grag2015
1个回答
1
错误信息显示您未安装PyQt4或PySide >= 1.0.3。您应该检查其中一个软件包是否正确安装。您说您已经安装了pyqt，但是出现了错误。也许它是pyqt版本3。PyQt版本4有不同的名称，如PyQt4。在这种情况下，您应该安装pyqt4。
我使用brew ls --versions检查了pyqt的版本，看起来pyqt、qt和sip都是最新的。版本号分别为：pyqt 4.11.1；qt 4.8.6；sip 4.16.3。也许我需要手动导入pyqt？或者我的某个文件路径出了问题？我将尝试重新安装pyqt、qt和sip，看看是否能解决问题。 - thereislight
你是否检查了更新的PYTHONPATH，例如 "export PYTHONPATH=/usr/local/lib/python2.7/site-packages:$PYTHONPATH"？Homebrew通常需要这样做。另一方面，你可以尝试使用Homebrew安装ipython，而不是pip。 - Jihun
啊，是的，我刚刚做了那个，它运行得非常好！非常感谢。顺便问一下，你知道为什么Homebrew通常需要那个/为什么那行代码使所有东西都能正常工作吗？ - thereislight
由于Homebrew不是操作系统的官方部分，因此它不会触及/usr/lib。相反，它们把包安装在/usr/local/里。相比之下，Python通常是由操作系统默认安装的。因此，除非您明确要求，否则Python不会查找/usr/local/lib。 - Jihun
嗯，好的，那有点明白了。再次感谢！ - thereislight
网页内容由stack overflow 提供, 点击上面的
可以查看英文原文，
原文链接