import pandas as pd
data1 = {'name': ['wang','xiao','lin','du','cui'], 'chi': [82,93,75,97,85],'py':[86,94,86,68,98]}
frame1=pd.DataFrame(data1)
print(frame1)
how can I change the default index 0 1 2 3 4 into a b c d e? Please advise me about this, thanks.