Complex sentence: By the end of September 1947, almost all the Hindus had left West Punjab/Lahore for India, but their tradition of Basant remained; and even today Lahore take pride in Basant and fly kites from their rooftops with the same enthusiasm.
Split into simpler sentences: By the end of September 1947, almost all the Hindus had left West Punjab/Lahore for India. Today people in Lahore take pride in Basant and fly kites from their rooftops with the same enthusiasm.