[Python] DELHI AQI PROJECT Error showing, Tried AI as well still issue isn't solved

Create AQI categories (you can adjust thresholds)

def categorize_aqi(aqi):

if aqi <=50: return 'Good'
elif aqi <=100: return 'Moderate'
elif aqi <=200: return 'Poor'
elif aqi <=300: return 'Unhealthy'
elif aqi <=400: return 'Severe'
else: return 'Hazardous'

df['AQI_Category'] = df['AQI'].apply(categorize_aqi)
aqi_counts = df['AQI_Category'].value_counts()


'str' object is not callable

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