Question

我在ubuntu上使用Ipython作为Enthought Python Distribution（EPD）的一部分。将Ipython从1.1.0-3升级到2.0.0-1，将pyzmq从2.2.0-4升级到14.1.1.-1，我遇到了一些问题。内联3D散点图由于ZMQ中的签名/未签名操作，图表失败。

代码示例：

%matplotlib inline
import matplotlib.pylab as plt
from mpl_toolkits.mplot3d import Axes3D
import random

fig = plt.figure(figsize = (10,8))
ax = fig.add_subplot(111, projection='3d')
xs,ys, zs = [], [], []
for frame_time in range(100):
    xs.append(random.random())
    ys.append(random.random())
    zs.append(random.random())
ax.scatter(xs, ys, zs)

尝试在Ipython笔记本中运行时，我收到以下错误消息：

OverflowError：无法将负值转换为无符号PY_LONG_LONG

完整的错误消息：

<mpl_toolkits.mplot3d.art3d.Patch3DCollection at 0x9c0560c>

---------------------------------------------------------------------------
OverflowError                             Traceback (most recent call last)
/home/dsg-labuser/EPD/lib/python2.7/site-packages/IPython/kernel/zmq/pylab              /backend_inline.pyc in show(close)
 41     try:
 42         for figure_manager in Gcf.get_all_fig_managers():
 ---> 43             display(figure_manager.canvas.figure)
 44     finally:
 45         show._to_draw = []

/home/dsg-labuser/EPD/lib/python2.7/site-packages/IPython/core/display.pyc in   display(*objs, **kwargs)
133                 # kwarg-specified metadata gets precedence
134                 _merge(md_dict, metadata)
--> 135             publish_display_data('display', format_dict, md_dict)
136 
137 

/home/dsg-labuser/EPD/lib/python2.7/site-packages/IPython/core/displaypub.pyc in publish_display_data(source, data, metadata)
172         source,
173         data,
--> 174         metadata
175     )
176 

/home/dsg-labuser/EPD/lib/python2.7/site-packages/IPython/kernel/zmq/zmqshell.pyc in publish(self, source, data, metadata)
 86         self.session.send(
 87             self.pub_socket, u'display_data', json_clean(content),
 ---> 88             parent=self.parent_header, ident=self.topic,
 89         )
 90 

/home/dsg-labuser/EPD/lib/python2.7/site-packages/IPython/kernel/zmq/session.pyc in send(self, stream, msg_or_type, content, parent, ident, buffers, track, header, metadata)
644             # use dummy tracker, which will be done immediately
645             tracker = DONE
--> 646             stream.send_multipart(to_send, copy=copy)
647 
648         if self.debug:

/home/dsg-labuser/EPD/lib/python2.7/site-packages/zmq/sugar/socket.pyc in send_multipart(self, msg_parts, flags, copy, track)
263         """
264         for msg in msg_parts[:-1]:
--> 265             self.send(msg, SNDMORE|flags, copy=copy, track=track)
266         # Send the last part without the extra SNDMORE flag.
267         return self.send(msg_parts[-1], flags, copy=copy, track=track)

/home/dsg-labuser/EPD/lib/python2.7/site-packages/zmq/backend/cython/socket.so in zmq.backend.cython.socket.Socket.send (zmq/backend/cython/socket.c:5298)()

/home/dsg-labuser/EPD/lib/python2.7/site-packages/zmq/backend/cython/socket.so in zmq.backend.cython.socket.Socket.send (zmq/backend/cython/socket.c:5146)()

/home/dsg-labuser/EPD/lib/python2.7/site-packages/zmq/backend/cython/message.so in zmq.backend.cython.message.Frame.__cinit__ (zmq/backend/cython/message.c:1645)()

OverflowError: can't convert negative value to unsigned PY_LONG_LONG

Afer降级到旧版本的Ipython，事情再次正常。因此，ubuntu上的Ipython 2.0.0-1似乎存在一些问题。

感谢您的支持！

Answer 1

这是32b Python上pyzmq≥14.0的错误。它应该由this PR修复，这应该在接下来的几天内在pyzmq-14.2中发布。立即解决方法包括：

尽可能使用64b Python
使用pyzmq 13
手动应用上述补丁并安装pyzmq

在ubuntu上升级Ipython后，内联3D散点图失败

1 个答案: