Error when running abcEconomics using the latest flexx version (0.80)

[rht]

Traceback (most recent call last):
  File "start.py", line 9, in <module>
    from abcEconomics import Simulation, gui
  File "/home/rht/code/venv/lib/python3.8/site-packages/abcEconomics/gui/__init__.py", line 8, in <module>
    from .basiclayout import basiclayout
  File "/home/rht/code/venv/lib/python3.8/site-packages/abcEconomics/gui/basiclayout.py", line 9, in <module>
    from .dockpanel import DockPanel
  File "/home/rht/code/venv/lib/python3.8/site-packages/abcEconomics/gui/dockpanel.py", line 1, in <module>
    from flexx.pyscript import window
ModuleNotFoundError: No module named 'flexx.pyscript'

The flexx API has changed.

[rht]

I reran this on latest version of flexx. No longer observed any errors.

[rht]

The unit tests worked, but some of the examples don't work with the gui. Reopening.

[mschlechtinger]

I'm facing the same error (most likely caused by flexx). I tried using the newest version of flexx and tornado as well as the versions specified by abcEconomics.

Traceback (most recent call last):
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\pyscript\commonast.py", line 764, in _convert
    converter = getattr(self, '_convert_' + type)
AttributeError: 'NativeAstConverter' object has no attribute '_convert_Constant'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/Users/mschlechtinger/PycharmProjects/abcE/main.py", line 4, in <module>
    from abcEconomics import Simulation, gui
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\abcEconomics\gui\__init__.py", line 6, in <module>
    from flexx import app
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\app\__init__.py", line 79, in <module>
    from .session import manager, Session
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\app\session.py", line 8, in <module>
    from .model import Model, new_type
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\app\model.py", line 76, in <module>
    from ..event._js import create_js_hasevents_class, HasEventsJS
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\event\_js.py", line 178, in <module>
    HasEventsJS.JSCODE = get_HasEvents_js()
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\event\_js.py", line 157, in get_HasEvents_js
    jscode = py2js(HasEventsJS, 'HasEvents')
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\event\_js.py", line 23, in py2js
    return py2js_(*args, **kwargs)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\pyscript\functions.py", line 83, in py2js
    return py2js_(ob)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\pyscript\functions.py", line 69, in py2js_
    p = Parser(pycode, **parser_options)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\pyscript\parser0.py", line 195, in __init__
    self._root = ast.parse(code)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\pyscript\commonast.py", line 35, in parse
    return converter.convert(comments)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\pyscript\commonast.py", line 747, in convert
    node = self._convert(native_node)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\pyscript\commonast.py", line 768, in _convert
    val = converter(n)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\pyscript\commonast.py", line 858, in _convert_Expr
    return Expr(self._convert(n.value))
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flexx\pyscript\commonast.py", line 766, in _convert
    raise RuntimeError('Cannot convert %s nodes.' % type)
RuntimeError: Cannot convert Constant nodes.

[rht]

@mschlechtinger if you want a quick workaround, you can clone the repo, then change this line to == instead of >=.

[mschlechtinger]

@rht thanks for the reply! I already tried manually downloading flexx 0.4.1 as well as cloning + changing the repo but I'm always encountering the same error when I try to import the gui from abcEconomics.

this is the result of a pip freeze:

abcEconomics==0.9.7b2
alembic==1.4.2
banal==1.0.1
bkcharts==0.2
bokeh==0.12.16
certifi==2020.6.20
chardet==3.0.4
click==7.1.2
Cython==0.29.21
dataset==0.8.0
dialite==0.5.2
flexx==0.4.1
future==0.18.2
idna==2.10
Jinja2==2.11.2
jsonpointer==2.0
Mako==1.1.3
MarkupSafe==1.1.1
normality==0.6.1
numpy==1.19.1
packaging==20.4
pandas==1.1.0
pscript==0.7.4
PyNSim==0.1.5
pyparsing==2.4.7
python-dateutil==2.8.1
python-editor==1.0.4
pytz==2020.1
PyYAML==5.3.1
requests==2.24.0
rfc3987==1.3.8
six==1.15.0
SQLAlchemy==1.3.18
strict-rfc3339==0.7
tornado==4.3
urllib3==1.25.10
validate-email==1.3
webruntime==0.5.7

[rht]

I found the error reported here: https://github.com/flexxui/flexx/issues/608. It is strange that the solution is to update to pscript 0.7.3, but you already have pscript 0.7.4. The other solution is to downgrade Python to 3.7, which is kind of annoying to do.

Maybe you shouldn't use gui for now.

[mschlechtinger]

@rht thanks a lot for the support! Downgrading helps to start the gui atm. However, I am not able to start the simulation because I'm encountering a similar error:

ERROR flexx.event: 
Traceback (most recent call last):
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python37\lib\site-packages\abcEconomics\gui\basiclayout.py", line 139, in display_results
    path = events['subdir']
KeyError: 'subdir'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python37\lib\site-packages\flexx\event\_handler.py", line 251, in handle_now
    self(*events)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python37\lib\site-packages\flexx\event\_handler.py", line 204, in __call__
    res = func(*events)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python37\lib\site-packages\abcEconomics\gui\basiclayout.py", line 104, in run_simulation
    self.display_results(events, abcEconomics.simulation_name)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python37\lib\site-packages\abcEconomics\gui\basiclayout.py", line 141, in display_results
    path = newest_subdirectory('./result', simulation_name)
  File "C:\Users\mschlechtinger\AppData\Local\Programs\Python\Python37\lib\site-packages\abcEconomics\gui\basiclayout.py", line 199, in newest_subdirectory
    raise Exception()
Exception

I hope flexx will fix this issue in the next couple of releases. I will probably just use abcE without the gui for now.

[rht]

208 will remove the GUI code, so that simulation.graphs(), @gui, etc are now obsolete. If anyone wants to do GUI they can do it via the mature Jupyter widgets.

[rht]

https://ipywidgets.readthedocs.io/en/stable/examples/Widget%20Basics.html