Python: How to Use try exception to Display Abnormal Error Information

Here is an example codes to use exception to display abnormal error

import traceback

kkk = [1,2,3,4]
for index in range(2,-1,-1):
    try:
        print(kkk[index+2])
    except:
        traceback.print_exc()
        print('traceback.format_exc():\n%s' % traceback.format_exc())

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