The method used in a variable for statement numbered in the python name.

# Year1 type conversion
    index = 1

    while(index<=57):

        colname = Year1.columns[index]

        col = getattr(Year1, colname)

        Year1[colname] = col.astype(float)

        index+=1

    col = getattr(Year1, 'Y')

    Year1['Y'] = col.astype(int)

# Year 2 type conversion
    index = 1

    while(index<=57):

        colname = Year2.columns[index]

        col = getattr(Year2, colname)

        Year2[colname] = col.astype(float)

        index+=1

    col = getattr(Year2, 'Y')

    Year2['Y'] = col.astype(int)