import teradata as td
udaExec = td.UdaExec(appName =  "TeradataConnection", version = "1.0", logConsole = False)
TDconn = udaExec.connect( method = "odbc",
                                  system = "mySystem",
                                  username = usrName,
                                  password = psswd')

import pandas as pd
tddf = pandas.read_sql(myTDsQLqury, TDconn)

x = 0.7 typ: <class 'float'> ,y =  0.7000000000000001 typ: <class 'float'> comparision =  False
x = 1.797 typ: <class 'float'> ,y =  1.7970000000000002 typ: <class 'float'> comparision =  False
x = 1.011 typ: <class 'float'> ,y =  1.0110000000000001 typ: <class 'float'> comparision =  False

from teradata import datatypes

udaExec.connect("${dataSource}", dataTypeConverter=datatypes.DefaultDataTypeConverter(
                    useFloat=True))