Plotly.py: inconsistency in (bar) chart api - width does not accept pandas series

Created on 19 Oct 2018 · 4Comments · Source: plotly/plotly.py

Hi Plotly Team,

I may have stumbled across an inconsistency in the api for the bar chart trace. I have gotten used to be able to pass pandas series to trace properties. However assigning the width of a bar chart does not work as expected if a pandas series is passed - the trace is not displayed. A simple example to reproduce the behavior in a Jupyter Notebook is provided below.

import pandas as pd
import plotly.graph_objs as go

df = pd.DataFrame({
    'Group': [1, 2, 3],
    'Height': [3, 2, 1],
    'Width': [0.1, 0.2, 0.3],
})

traces = [
    go.Bar(
        x=df['Group'],
        y=df['Height'],
        width=df['Width'].tolist(),
        xaxis='x',
    ),
    go.Bar(
        x=df['Group'],
        y=df['Height'],
        width=df['Width'],
        xaxis='x2',
    ),
]

layout = go.Layout(
    xaxis={'domain': [0, 0.48]},
    xaxis2={'domain': [0.52, 1]},
)

go.FigureWidget(
    data=traces,
    layout=layout,
)

While the workaround is quite simple, it might be worth considering to make it work with pandas series as well.

Thanks for this great library!

bug plotly.js

Source

roeap

All 4 comments

Thanks for the report @roeap, I see what you mean.

Technical notes:
This probably means that plotly.js is not properly handling a typed array passed as the bar.width property, but we should confirm this in a codepen and open a plotly.js issue if so.