indexing dataframes python code example

Example 1: pandas index

How to add index to the DataFrame at runtime

df["patient"] = ["patient-" + str( i ) for i in range( max( df.index ) + 1  )]
df.set_index( "patient", inplace=True )
---------------------------------------------------------------------                 
patient = pandas.Series( ["patient-" + str( i ) for i in range( max( df.index ) + 1 )] )
df.index = patient
---------------------------------------------------------------------
df.index = ["patient-" + str( i ) for i in range( max( df.index ) + 1 )]

Example 2: indexing column in pandas

In [10]: type(titanic[["Age", "Sex"]])
Out[10]: pandas.core.frame.DataFrame