python - 为什么 IPython QtConsole 没有启动？

Question

我已经按照安装页面中的说明使用“pip install ipython[all]”安装了 ipython，还使用自制软件(qt、pyqt 和 sip)安装了 qtconsole 依赖项。但是，当我尝试使用“ipython qtconsole”从终端启动 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？任何帮助将不胜感激。

Answer 1

错误消息说您既没有安装 PyQt4 也没有安装 PySide >=1.0.3。您应该检查正确安装的两个软件包之一。你说你安装了 pyqt 但你得到了错误。也许，它是 pyqt 版本 3。PyQt 版本 4 有不同的名称，例如 PyQt4。在这种情况下，您应该安装 pyqt4。