old_contents: import sys
  sys.path.append("visualization/")
  
  #---Switch between two visualization methods by making one of the following lines as a comment---
  import basemapviz as viz
  #import plotlyviz as viz
  
  import pandas as pd
  
  COLUMNS = ["country", "value"]
  
  #result = pd.read_csv('VizDemoData/changes.csv', names=COLUMNS)
  
  result = pd.read_csv('VizDemoData/attractiveness.csv', names=COLUMNS)
  
  #result = pd.read_csv('VizDemoData/migrants.csv', names=COLUMNS)
  
  #---three arguments correspondingly are Pandas Dataframe, figure title, and colorbar label---
  viz.map(result, "Country Attractiveness", "value")
  
new_contents: import sys
  sys.path.append("visualization/")
  
  #---Switch between two visualization methods by making one of the following lines as a comment---
  #import basemapviz as viz
  import plotlyviz as viz
  
  import pandas as pd
  
  COLUMNS = ["country", "value"]
  
  #result = pd.read_csv('VizDemoData/changes.csv', names=COLUMNS)
  
  result = pd.read_csv('VizDemoData/attractiveness.csv', names=COLUMNS)
  
  #result = pd.read_csv('VizDemoData/migrants.csv', names=COLUMNS)
  
  #---three arguments correspondingly are Pandas Dataframe, figure title, and colorbar label---
  viz.map(result, "Country Attractiveness", "value")
  
subject: Update VizDemo.py