pandas, melt, unmelt preserve index

Question

I\'ve got a table of clients (coper) and asset allocation (asset)

A = [[1,2],[3,4],[5,6]]
idx = [\'coper1\',\'coper2\',\'coper3\']
cols = [\'asset1\',\'asset         


        

Answer 1

set the ignore_index to be False to preserve the index, e.g.

df = df.melt(var_name=‘species’, value_name=‘height’, ignore_index = False)