Pycharm中的traitlets.traitlets.TraitError

Question

我是python的初学者.我面临以下问题.

每当我启动pycharm社区版(版本5.0.3)时,Python控制台无法启动并显示以下错误:

usr/bin/python2.7 /usr/lib/pycharm-community/helpers/pydev/pydevconsole.py 53192 49994 
Traceback (most recent call last):  
  File "/usr/lib/pycharm-community/helpers/pydev/pydevconsole.py", line 488, in <module>
    pydevconsole.StartServer(pydev_localhost.get_localhost(), int(port), int(client_port))
  File "/usr/lib/pycharm-community/helpers/pydev/pydevconsole.py", line 330, in StartServer
    interpreter = InterpreterInterface(host, client_port, threading.currentThread())
  File "/usr/lib/pycharm-community/helpers/pydev/pydev_ipython_console.py", line 26, in __init__
    self.interpreter = get_pydev_frontend(host, client_port)
  File "/usr/lib/pycharm-community/helpers/pydev/pydev_ipython_console_011.py", line 472, in get_pydev_frontend
    _PyDevFrontEndContainer._instance = _PyDevFrontEnd()
  File "/usr/lib/pycharm-community/helpers/pydev/pydev_ipython_console_011.py", line 303, in __init__
    self.ipython = PyDevTerminalInteractiveShell.instance()
  File "/usr/lib/python2.7/dist-packages/IPython/config/configurable.py", line 354, in instance
    inst = cls(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/IPython/terminal/interactiveshell.py", line 328, in __init__
    **kwargs
  File "/usr/lib/python2.7/dist-packages/IPython/core/interactiveshell.py", line 483, in __init__
    self.init_readline()
  File "/usr/lib/python2.7/dist-packages/IPython/core/interactiveshell.py", line 1816, in init_readline
    if self.readline_use:
  File "/home/vivekruhela/.local/lib/python2.7/site-packages/traitlets/traitlets.py", line 529, in __get__
    return self.get(obj, cls)
  File "/home/vivekruhela/.local/lib/python2.7/site-packages/traitlets/traitlets.py", line 507, in get
    % (self.name, obj))
  traitlets.traitlets.TraitError: No default value found for None trait of <pydev_ipython_console_011.PyDevTerminalInteractiveShell object at 0x7f7b0e682cd0>

Process finished with exit code 1
Couldn't connect to console process.

如何连接到pycharm控制台？我已经在我的系统中安装了IPython.

Answer 1

我发现这是因为我安装了ipython版本4.x,然后恢复到3.2.0,而没有首先卸载更高级版本的traitlets.这样就可以了:

pip uninstall ipython[all]
pip uninstall traitlets
pip install ipython==3.2.0

Answer 2

我遇到过同样的问题.我通过更新ipython解决了这个问题.

我的版本是3.1.0,升级到4.1.1解决了它.

在我的情况下:

workon project
pip install -U ipython