How can I get rid of horizontal gaps between stacked bars when using go.Bar()?

Question

This is an example from Plotly's documentation:

import plotly.graph_objects as go
fig = go.Figure(data=[
    go.Bar(name='SF Zoo', x=['giraffes', 'orangutans', 'monkeys'], y=[20, 14, 23]),
    go.Bar(name='LA Zoo', x=['giraffes', 'orangutans', 'monkeys'], y=[12, 18, 29])
])
fig.update_layout(barmode='stack')

On their website it looks like this:

Here it looks like this:

How can I get rid of the tiny gap in the monkeys column?

Answer 1

Those aren't gaps, but lines set with the color '#636efa'. You can ignore them by running:

fig.update_traces(marker = dict(line = dict(color = 'rgba(0,0,0,0)')))

Or just:

fig.update_traces(marker_line_color =  'rgba(0,0,0,0)')

Plot

Complete code:

import plotly.graph_objects as go
fig = go.Figure(data=[
    go.Bar(name='SF Zoo', x=['giraffes', 'orangutans', 'monkeys'], y=[20, 14, 23]),
    go.Bar(name='LA Zoo', x=['giraffes', 'orangutans', 'monkeys'], y=[12, 18, 29])
])

fig.update_layout(barmode='stack')
# fig.update_traces(marker = dict(line = dict(color = 'rgba(0,0,0,0)')))
fig.update_traces(marker_line_color =  'rgba(0,0,0,0)')
fig.show()