相关疑难解决方法(0)

是否可以一次升级所有Python包pip？

请注意,官方问题跟踪器上有此功能请求.

我正在使用Ubuntu并安装了Python 2.7.5和3.4.0.在Python 2.7.5中,我能够成功分配变量x = Value('i', 2),但不能在3.4.0中分配.我正进入(状态:

Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/usr/local/lib/python3.4/multiprocessing/context.py", line 132, in Value
      from .sharedctypes import Value
   File "/usr/local/lib/python3.4/multiprocessing/sharedctypes.py", line 10, in <
module>
   import ctypes
   File "/usr/local/lib/python3.4/ctypes/__init__.py", line 7, in <module>
      from _ctypes import Union, Structure, Array
ImportError: No module named '_ctypes'

我刚刚通过安装3.4.0的源代码更新到3.3.2.它安装在/usr/local/lib/python3.4中.

我是否正确更新到Python 3.4？

有一点我注意到Python 3.4安装在usr/local/lib中,而Python 3.3.2仍然安装在usr/lib中,所以它没有被覆盖.

安装PyReadline后,IPython无法正常工作.当我卸载它时,它再次开始工作.

ipython的堆栈跟踪:

(py2.7_monitor)[root@vm10-136-8-98 monitor]# ipython
WARNING: IPython History requires SQLite, your history will not be saved
Traceback (most recent call last):
  File "/home/py2.7_monitor/bin/ipython", line 11, in <module>
    sys.exit(start_ipython())
  File "/home/py2.7_monitor/lib/python2.7/site-packages/IPython/__init__.py", line 118, in start_ipython
    return launch_new_instance(argv=argv, **kwargs)
  File "/home/py2.7_monitor/lib/python2.7/site-packages/traitlets/config/application.py", line 591, in launch_instance
    app.initialize(argv)
  File "<string>", line 2, in initialize
  File "/home/py2.7_monitor/lib/python2.7/site-packages/traitlets/config/application.py", line 75, in catch_config_error
    return method(app, *args, **kwargs)
  File "/home/py2.7_monitor/lib/python2.7/site-packages/IPython/terminal/ipapp.py", line 314, in initialize
    self.init_shell()
  File "/home/py2.7_monitor/lib/python2.7/site-packages/IPython/terminal/ipapp.py", line 330, in init_shell
    ipython_dir=self.ipython_dir, user_ns=self.user_ns)
  File "/home/py2.7_monitor/lib/python2.7/site-packages/traitlets/config/configurable.py", line 380, in …