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x
 
import pandas as pd
data = {
  "name": ["Sally", "Mary", "John"],
  "age": [50, 40, 30],
  "qualified": [True, False, False]
}
idx = ["X", "Y", "Z"]
df = pd.DataFrame(data, index=idx)
newdf = df.reset_index()
print(newdf)
    index   name  age  qualified
  0     X  Sally   50       True
  1     Y   Mary   40      False
  2     Z   John   30      False