bar_chart.py

import plotly.graph_objects as go

pub_counts_10.reverse()    # reverse order so that largest bar is on top
pub_names_10.reverse()     # (Plotly will graph the bottom bar first)

bar_chart = go.Figure(go.Bar(
  x = pub_counts_10,
  y = pub_names_10,
  orientation='h',      # horizontal bar chart
  marker=dict(
    color='rgba(0, 45, 168,0.5)',    # style the bars
    line=dict(
      color='rgba(0, 45, 168,1)', 
      width=1)
  )       
))

bar_chart.update_layout(
  title= "Math: Top 10 Pubs.",
  title_font_family="Arial Black",
  title_font_size=30,
  title_x=0.5,              # center the title
  xaxis_title="% of Math articles",
)

bar_chart.write_image("images/math-bar.png")    # export the graph as a png file