"Error in the keymap" when re-entering IPython REPL for the second time

[kyak]

When entering IPython REPL for the second time, there is an "Error in the keymap" error after entering any command.

Steps to reproduce:

1. Enter IPython REPL for the first time, issue a command and return to Julia REPL. So far so good:

julia> using IPython

julia> IPython.start_ipython()


In [1]: 1
Out[1]: 1

In [2]:

2. Enter IPython REPL again, issue a command and observe the error:

julia> IPython.start_ipython()


In [2]: 1
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
File /usr/lib/python3.10/site-packages/IPython/core/async_helpers.py:129, in _pseudo_sync_runner(coro)
    121 """
    122 A runner that does not really allow async execution, and just advance the coroutine.
    123
   (...)
    126 Credit to Nathaniel Smith
    127 """
    128 try:
--> 129     coro.send(None)
    130 except StopIteration as exc:
    131     return exc.value

File /usr/lib/python3.10/site-packages/IPython/core/interactiveshell.py:3084, in InteractiveShell.run_cell_async(self, raw_cell, store_history, silent, shell_futures, transformed_cell, preprocessing_exc_tuple, cell_id)
   3082 # Store raw and processed history
   3083 if store_history and raw_cell.strip(" %") != "paste":
-> 3084     self.history_manager.store_inputs(self.execution_count, cell, raw_cell)
   3085 if not silent:
   3086     self.logger.log(cell, raw_cell)

AttributeError: 'NoneType' object has no attribute 'store_inputs'

In [2]:

Below is more information about package versions and a more detailed log. The more detailed log is obtained by running IPython via . rather than IPython.start_ipython() (not sure why it's more detailed though). Thank you for this nice package! If you need more information, please let me know.

julia: v1.7.3
IPython.jl: v0.5.1
python: v3.10.5
ipython: v8.4.0
OS: Arch Linux

In [2]: 1 + 2
Press ENTER to continue...
Unhandled exception in event loop:
  File "/usr/lib/python3.10/asyncio/events.py", line 80, in _run
    self._context.run(self._callback, *self._args)
  File "/usr/lib/python3.10/site-packages/prompt_toolkit/input/vt100.py", line 173, in callback_wrapper
    callback()
  File "/usr/lib/python3.10/site-packages/prompt_toolkit/application/application.py", line 711, in read_from_input
    self.key_processor.process_keys()
  File "/usr/lib/python3.10/site-packages/prompt_toolkit/key_binding/key_processor.py", line 270, in process_keys
    self._process_coroutine.send(key_press)
  File "/usr/lib/python3.10/site-packages/prompt_toolkit/key_binding/key_processor.py", line 185, in _process
    self._call_handler(matches[-1], key_sequence=buffer[:])
  File "/usr/lib/python3.10/site-packages/prompt_toolkit/key_binding/key_processor.py", line 320, in _call_handler
    handler.call(event)
  File "/usr/lib/python3.10/site-packages/prompt_toolkit/key_binding/key_bindings.py", line 124, in call
    result = self.handler(event)
  File "/usr/lib/python3.10/site-packages/IPython/terminal/shortcuts.py", line 412, in newline_or_execute
    b.validate_and_handle()
  File "/usr/lib/python3.10/site-packages/prompt_toolkit/buffer.py", line 1880, in validate_and_handle
    self.append_to_history()
  File "/usr/lib/python3.10/site-packages/prompt_toolkit/buffer.py", line 1386, in append_to_history
    self.history.append_string(self.text)
  File "/usr/lib/python3.10/site-packages/IPython/terminal/interactiveshell.py", line 148, in append_string
    self._refresh()
  File "/usr/lib/python3.10/site-packages/IPython/terminal/interactiveshell.py", line 152, in _refresh
    self._loaded_strings = list(self.load_history_strings())
  File "/usr/lib/python3.10/site-packages/IPython/terminal/interactiveshell.py", line 157, in load_history_strings
    for __, ___, cell in self.shell.history_manager.get_tail(

Exception 'NoneType' object has no attribute 'get_tail'
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
File /usr/lib/python3.10/site-packages/IPython/core/async_helpers.py:129, in _pseudo_sync_runner(coro)
    121 """
    122 A runner that does not really allow async execution, and just advance the coroutine.
    123
   (...)
    126 Credit to Nathaniel Smith
    127 """
    128 try:
--> 129     coro.send(None)
    130 except StopIteration as exc:
    131     return exc.value

File /usr/lib/python3.10/site-packages/IPython/core/interactiveshell.py:3084, in InteractiveShell.run_cell_async(self, raw_cell, store_history, silent, shell_futures, transformed_cell, preprocessing_exc_tuple, cell_id)
   3082 # Store raw and processed history
   3083 if store_history and raw_cell.strip(" %") != "paste":
-> 3084     self.history_manager.store_inputs(self.execution_count, cell, raw_cell)
   3085 if not silent:
   3086     self.logger.log(cell, raw_cell)

AttributeError: 'NoneType' object has no attribute 'store_inputs'

In [2]: ┌ Error: Error in the keymap
│   exception =
│    PyCall.PyError("\$(Expr(:escape, :(ccall(#= /home/peselnikmg/.julia/packages/PyCall/7a7w0/src/pyfncall.jl:43 =# @pysym(:PyObject_Call), PyPtr, (PyPtr, PyPtr, PyPtr), o, pyargsptr, kw))))", PyCall.PyObject(Ptr{PyCall.PyObject_struct} @0x00007f552c3e5ce0), PyCall.PyObject(Ptr{PyCall.PyObject_struct} @0x00007f5517b5f830), PyCall.PyObject(Ptr{PyCall.PyObject_struct} @0x00007f55176c8140))
│    Stacktrace:
│      [1] pyerr_check
│        @ ~/.julia/packages/PyCall/7a7w0/src/exception.jl:62 [inlined]
│      [2] pyerr_check
│        @ ~/.julia/packages/PyCall/7a7w0/src/exception.jl:66 [inlined]
│      [3] _handle_error(msg::String)
│        @ PyCall ~/.julia/packages/PyCall/7a7w0/src/exception.jl:83
│      [4] macro expansion
│        @ ~/.julia/packages/PyCall/7a7w0/src/exception.jl:97 [inlined]
│      [5] #107
│        @ ~/.julia/packages/PyCall/7a7w0/src/pyfncall.jl:43 [inlined]
│      [6] disable_sigint
│        @ ./c.jl:458 [inlined]
│      [7] __pycall!
│        @ ~/.julia/packages/PyCall/7a7w0/src/pyfncall.jl:42 [inlined]
│      [8] _pycall!(ret::PyCall.PyObject, o::PyCall.PyObject, args::Tuple{PyCall.PyObject, PyCall.PyObject}, nargs::Int64, kw::Ptr{Nothing})
│        @ PyCall ~/.julia/packages/PyCall/7a7w0/src/pyfncall.jl:29
│      [9] _pycall!(ret::PyCall.PyObject, o::PyCall.PyObject, args::Tuple{PyCall.PyObject, PyCall.PyObject}, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
│        @ PyCall ~/.julia/packages/PyCall/7a7w0/src/pyfncall.jl:11
│     [10] pycall(::PyCall.PyObject, ::Type{Nothing}, ::PyCall.PyObject, ::Vararg{PyCall.PyObject}; kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
│        @ PyCall ~/.julia/packages/PyCall/7a7w0/src/pyfncall.jl:80
│     [11] pycall(::PyCall.PyObject, ::Type{Nothing}, ::PyCall.PyObject, ::Vararg{PyCall.PyObject})
│        @ PyCall ~/.julia/packages/PyCall/7a7w0/src/pyfncall.jl:80
│     [12] _start_ipython(f::PyCall.PyObject, returntype::Type) (repeats 2 times)
│        @ IPython ~/.julia/packages/IPython/hdHop/src/core.jl:39
│     [13] start_ipython
│        @ ~/.julia/packages/IPython/hdHop/src/core.jl:46 [inlined]
│     [14] on_dot_press(::REPL.LineEdit.MIState, ::REPL.LineEditREPL, ::Vararg{Any})
│        @ IPython ~/.julia/packages/IPython/hdHop/src/julia_repl.jl:49
│     [15] #invokelatest#2
│        @ ./essentials.jl:716 [inlined]
│     [16] invokelatest
│        @ ./essentials.jl:714 [inlined]
│     [17] (::REPL.LineEdit.var"#25#26"{typeof(IPython.on_dot_press), String})(s::Any, p::Any)
│        @ REPL.LineEdit /usr/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:1466
│     [18] (::REPL.LineEdit.var"#242#250")(s::REPL.LineEdit.MIState, data::REPL.LineEdit.ModeState, c::Union{Char, SubString{String}, String})
│        @ REPL.LineEdit /usr/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2356
│     [19] #invokelatest#2
│        @ ./essentials.jl:716 [inlined]
│     [20] invokelatest
│        @ ./essentials.jl:714 [inlined]
│     [21] (::REPL.LineEdit.var"#25#26"{REPL.LineEdit.var"#242#250", String})(s::Any, p::Any)
│        @ REPL.LineEdit /usr/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:1466
│     [22] prompt!(term::REPL.Terminals.TextTerminal, prompt::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit /usr/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2586
│     [23] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit /usr/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2488
│     [24] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
│        @ REPL /usr/share/julia/stdlib/v1.7/REPL/src/REPL.jl:1232
│     [25] (::REPL.var"#49#54"{REPL.LineEditREPL, REPL.REPLBackendRef})()
│        @ REPL ./task.jl:429
└ @ REPL.LineEdit /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2588

[crackleware]

@kyak try this workaround at REPL:

import IPython, PyCall
entrypoints = PyCall.pyimport("ipython_jl").entrypoints
_run_once_old = entrypoints._run_once
entrypoints._run_once = function (ip)
    ip._atexit_once_called = true
    _run_once_old(ip)
end

[kyak]

@crackleware thanks a lot, it works!