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AssertionError on matplotlib interactive mode #952

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hs-vc opened this issue Jun 8, 2023 · 2 comments
Open

AssertionError on matplotlib interactive mode #952

hs-vc opened this issue Jun 8, 2023 · 2 comments

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@hs-vc
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hs-vc commented Jun 8, 2023 •
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When attempting to zoom into any area of a plot created using the matplotlib library in Jupyter Notebook with interactive mode enabled, an Assertion Error message is generated in the ~/.jupyter/log. Consequently, the zoom functionality does not work correctly.

Following is reproducible jupyter notebook code.

import matplotlib.pyplot as plt

%matplotlib nbagg

fig, ax = plt.subplots()
ax.plot([1,2,3], [1,2,3])

# And then zoom any areay

Below is error message in ~/.jupyter/log created every time zooming any area in the plot.

[E 04:10:45.852 NotebookApp] Uncaught exception in zmqstream callback
    Traceback (most recent call last):
      File "/opt/python/py3.10/lib/python3.10/site-packages/zmq/eventloop/zmqstream.py", line 634, in _handle_events
        self._handle_recv()
      File "/opt/python/py3.10/lib/python3.10/site-packages/zmq/eventloop/zmqstream.py", line 663, in _handle_recv
        self._run_callback(callback, msg)
      File "/opt/python/py3.10/lib/python3.10/site-packages/zmq/eventloop/zmqstream.py", line 584, in _run_callback
        f = callback(*args, **kwargs)
      File "/opt/python/py3.10/lib/python3.10/site-packages/zmq/eventloop/zmqstream.py", line 308, in stream_callback
        return callback(self, msg)
      File "/opt/python/py3.10/lib/python3.10/site-packages/notebook/services/kernels/handlers.py", line 572, in _on_zmq_reply
        super()._on_zmq_reply(stream, msg)
      File "/opt/python/py3.10/lib/python3.10/site-packages/notebook/base/zmqhandlers.py", line 256, in _on_zmq_reply
        self.write_message(msg, binary=isinstance(msg, bytes))
      File "/opt/python/py3.10/lib/python3.10/site-packages/tornado/websocket.py", line 339, in write_message
        return self.ws_connection.write_message(message, binary=binary)
      File "/opt/python/py3.10/lib/python3.10/site-packages/tornado/websocket.py", line 1086, in write_message
        fut = self._write_frame(True, opcode, message, flags=flags)
      File "/opt/python/py3.10/lib/python3.10/site-packages/tornado/websocket.py", line 1061, in _write_frame
        return self.stream.write(frame)
      File "/opt/python/py3.10/lib/python3.10/site-packages/tornado/iostream.py", line 546, in write
        self._handle_write()
      File "/opt/python/py3.10/lib/python3.10/site-packages/tornado/iostream.py", line 976, in _handle_write
        self._write_buffer.advance(num_bytes)
      File "/opt/python/py3.10/lib/python3.10/site-packages/tornado/iostream.py", line 182, in advance
        assert 0 < size <= self._size
    AssertionError

I tested with
Python: 3.10.10
notebook: 6.5.4
matplotlib: 3.7.1
tornado: 6.2
pyzmq: 25.0.2
jupyter_client: 8.2.0

I seems that this issue is specifically related to jupyter_client v8.2.0. The error does not occur with jupyter_client versions 7.x while other versions remain unchanged.
@ccordoba12
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By interactive you mean the Notebook backend or the Qt, Tk, etc ones?

@hs-vc
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hs-vc commented Jun 12, 2023

By interactive you mean the Notebook backend or the Qt, Tk, etc ones?

I mean notebook backend.

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@ccordoba12 @hs-vc