Hi I have a simple that displays a pandas dataframe. I update the
dataframe in a callback to my button 'on_click' function.
The declarative widget does not pick-up the change. I have to explicitly
evaluate the dataframe in a cell for the declarative widget to pick up the
change.
import declarativewidgets as declwidgets
from ipywidgets import widgets # Widget definitions
from IPython.display import display # Used to display widgets in the
notebook
declwidgets.init()
import pandas as pd
df1 = pd.DataFrame([
[1, 3],
[2, 4]
], columns=["a", "b"]
)
def update_pd_df(df, data={}):
cur_b = df.loc[df.a == data.get('a', None) ,'b']
df.loc[df.a == data.get('a', None) ,'b'] = data.get('b', cur_b)
%%html
<link rel="stylesheet" type="text/css" href="bcard.css">
<link rel="import"
href="urth_components/urth-viz-table/urth-viz-table.html"
is="urth-core-import">
<template is="dom-bind">
<urth-core-dataframe id="f1" ref="df1" value="{{df}}" auto
></urth-core-dataframe>
<urth-viz-table datarows="{{ df.data }}" selection="{{sel}}"
columns="{{ df.columns }}" rows-visible=6>
</urth-viz-table>
</template>
btn = widgets.Button(description='click me')
def on_btn_clicked(b):
update_pd_df(df1, data={'a': 1, 'b': 18})
print('changing df1')
btn.on_click(on_btn_clicked)
display(btn)
df1 #now it updates
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