Update test.py

Author: hiwan

test.py

@@ -1,6 +1,5 @@
 import pytest
 import pandas as pd
-import plotly.express as px
 import plotly.graph_objs as go
 from main_page import melt_clean_data, load_data, select_columns
 from main_page import code_mapping, convert_to_alpha3, plot_choropleth
@@ -120,5 +119,5 @@ def test_plot_choropleth(test_case_plot):
         assert isinstance(fig, go.Figure)
         print('Test passed: The function returned a Plotly Figure object.')
     except AssertionError:
-        print(f'Test failed')
-        
+        print('Test failed')
+