Filtering DataFrame Index:

import pandas as pd

df = pd.DataFrame({'DateOfBirth': ['1986-11-11', '1999-05-12', '1976-01-01',
                                   '1986-06-01', '1983-06-04', '1990-03-07',
                                   '1999-07-09'],
                   'State': ['NY', 'TX', 'FL', 'AL', 'AK', 'TX', 'TX']
                   },
                  index=['Jane', 'Pane', 'Aaron', 'Penelope', 'Frane',
                         'Christina', 'Cornelia'])
print(df)
print("\n---- Filter Index contains ane ----\n")
df.index = df.index.astype('str')
df1 = df[df.index.str.contains('ane')]

print(df1)

C:\pandas>python example44.py
          DateOfBirth State
Jane       1986-11-11    NY
Pane       1999-05-12    TX
Aaron      1976-01-01    FL
Penelope   1986-06-01    AL
Frane      1983-06-04    AK
Christina  1990-03-07    TX
Cornelia   1999-07-09    TX
 
---- Filter Index contains ane ----
 
      DateOfBirth State
Jane   1986-11-11    NY
Pane   1999-05-12    TX
Frane  1983-06-04    AK
 
C:\pandas>