Geopandas for world map plotting from CSV files

df = gpd.read_file("world-polygon.shp")

df.head()

df = df(['Country', 'Confirmed'])

data_for_map = df.rename(index=str, columns={'Country':'Regions','Confirmed':'Conf'})

data_for_map.head()

It gives me the error

TypeError: 'GeoDataFrame' object is not callable

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This image is of the code