How to use the specs parameter?

📊 Plotly Python
1

i have the code below that plot several pie charts with one bar chart using make_subplot while i assign each chart in the specs list the result is correct.

But if i try to make the specs parameter flexible the system crash and display the below error:

ValueError:
The ‘specs’ argument to make_subplots must be a 2D list of dictionaries with dimensions (2 x 3).
Received value of type <class ‘list’>: [[{‘type’: ‘pie’}, {‘type’: ‘pie’}, {‘type’: ‘pie’}, {‘type’: ‘pie’}, {‘type’: ‘pie’}, {‘type’: ‘pie’}], [{‘type’: ‘bar’}]]

code:


import plotly.graph_objs as go
from plotly.subplots import make_subplots

import plotly.express as px

lst = list(df.groupby('eventmohafaza_name'))


# here we want our grid to be 2 x 3
rows = 2
cols = 3
# continents are the first element in l
subplot_titles = [l[0] for l in lst]

# if i try  the below line the system crash 
specs = [[{"type": "pie"}]* cols * rows ,[{"type": "bar"}]]

# if i try the below line the system work correctly 
#specs=[
#         [{"type": "pie"},{"type": "pie"},{"type": "pie"}],
#       [{"type": "pie"},{"type": "pie"},{"type": "bar"}],

#]

fig = make_subplots(
        rows=rows,
        cols=cols,
        subplot_titles=subplot_titles,
        specs=specs,
        print_grid=True)

for i, l in enumerate(lst):
    # basic math to get col and row
    row = i // cols + 1
    col = i % (rows + 1) + 1
    # this is the dataframe for every continent
    d = l[1]
   
    fig.add_trace(go.Pie(labels=d["eventtype_name"],
                         values = d["number"],
                         hovertemplate = "%{label}: <br>Value: %{value} ",
                         showlegend=True,
                         textposition='inside',
                         rotation=90),
     row=row,
     col=col    
    )
    
group_event_groups = df.groupby([df['eventmohafaza_name'],df['eventtype_name']]).size().unstack()    
for x in group_event_groups.columns: 
    fig.add_trace(go.Bar(name=str(x), x=group_event_groups.index, y=group_event_groups[x],showlegend=False), row=2, col=3)
    
fig.update_layout(height=800,width=800,title="Population by Continent", title_x=0.5)
fig.show()