iPython在使用os.dup2()后将不再启动

Question

当我输入os.dup2(3,1)时，我只是尝试了os.dup2()函数来重定向输出，而我的ipython (2.7)似乎并不喜欢它。它崩溃了，现在它将不再启动，从而产生错误：

Traceback (most recent call last):
  File "/usr/bin/ipython", line 8, in <module>
    launch_new_instance()
  File "/usr/lib/python2.7/dist-packages/IPython/frontend/terminal/ipapp.py", line 402, in launch_new_instance
    app.initialize()
  File "<string>", line 2, in initialize
  File "/usr/lib/python2.7/dist-packages/IPython/config/application.py", line 84, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/IPython/frontend/terminal/ipapp.py", line 312, in initialize
    self.init_shell()
  File "/usr/lib/python2.7/dist-packages/IPython/frontend/terminal/ipapp.py", line 332, in init_shell
    ipython_dir=self.ipython_dir)
  File "/usr/lib/python2.7/dist-packages/IPython/config/configurable.py", line 318, in instance
    inst = cls(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/IPython/frontend/terminal/interactiveshell.py", line 183, in __init__
user_module=user_module, custom_exceptions=custom_exceptions
  File "/usr/lib/python2.7/dist-packages/IPython/core/interactiveshell.py", line 456, in __init__
    self.init_readline()
  File "/usr/lib/python2.7/dist-packages/IPython/core/interactiveshell.py", line 1777, in init_readline
    self.refill_readline_hist()
  File "/usr/lib/python2.7/dist-packages/IPython/core/interactiveshell.py", line 1789, in refill_readline_hist
    include_latest=True):
  File "/usr/lib/python2.7/dist-packages/IPython/core/history.py", line 256, in get_tail
    return reversed(list(cur))
DatabaseError: database disk image is malformed

If you suspect this is an IPython bug, please report it at:
    https://github.com/ipython/ipython/issues
or send an email to the mailing list at ipython-dev@scipy.org

You can print a more detailed traceback right now with "%tb", or use "%debug"
to interactively debug it.

Extra-detailed tracebacks for bug-reporting purposes can be enabled via:
    c.Application.verbose_crash=True

有人能帮我吗？

Answer 1

重新张贴作为答复：

看起来fd3是您的IPython历史数据库，您将stdout重定向到它并破坏它。

要让它重新启动，请删除或重命名~/.ipython/profile_default/history.sqlite (或在Linux上的某些IPython版本上重命名~/.config/ipython/profile_default/history.sqlite )。