Remove \xa0 string to columns

Hi experts,

I got a string added to my training set, thus causing error. I need yo to fix that line of code.
The error was as a result of clf.get_params(). now i get the list below...
Remove \xa0

{'attack_ Yugoslavia': 1.3991312407921914,
'attack_Algeria\xa0': 1.0056501933702557,
'attack_Argentina\xa0': 1.2003944099100163,
'attack_Australia\xa0': 0.4121094794944381,
'attack_Austria\xa0': 1.9422748385956041,
'attack_Belgium\xa0': 1.0937172294538362,
'attack_Bosnia and Herzegovina\xa0': 2.1886775370326537,
'attack_Brazil\xa0': 1.2105479810728585,
'attack_Bulgaria\xa0': 1.4331232973337464,
'attack_Cameroon\xa0': 0.9384023689746218,
'attack_Chile\xa0': 1.4154176279791413,
'attack_Colombia\xa0': 1.286516266500355,
'attack_Costa Rica\xa0': -0.2520033132291192,
'attack_Croatia\xa0': 1.0654741813527822,
'attack_Cuba\xa0': 1.5093061736724183,
'attack_Czechoslovakia\xa0': 1.6696811076127949,
'attack_Denmark\xa0': -0.1452368737050853,
'attack_Ecuador\xa0': -0.23080349360313324,
'attack_Egypt\xa0': 0.0807761819281453,
'attack_England\xa0': 1.0084646227360887,
'attack_France\xa0': 1.5056846579998202,
'attack_Germany\xa0': 0.8971741287341036,
'attack_Ghana\xa0': -0.04349363418273761,
'attack_Greece\xa0': 1.683581026277456,
'attack_Honduras\xa0': -0.013164612588811651,
'attack_Hungary\xa0': 2.0629739102089175,
'attack_Iceland\xa0': 1.1873798739031618,
'attack_Iran\xa0': -0.3970855002153237,
'attack_Italy\xa0': 1.4680015673019773,
'attack_Ivory Coast\xa0': 1.824453626688032,
'attack_Japan\xa0': -0.10745456698033427,
'attack_Mexico\xa0': 0.420071821486702,
'attack_Morocco\xa0': -0.9447916965467382,
'attack_Netherlands\xa0': 0.8645191483987201,
'attack_Nigeria\xa0': 0.9611109968018131,
'attack_North Korea\xa0': 1.1444477969213043,
'attack_Northern Ireland\xa0': 1.083323156939494,
'attack_Panama\xa0': -0.2635725396779136,
'attack_Paraguay\xa0': 1.0187731690350077,
'attack_Peru\xa0': 0.15190507283740343,
'attack_Poland\xa0': 0.6303171308680389,
'attack_Portugal\xa0': 1.5203781877627214,
'attack_Republic of Ireland\xa0': -1.0747143849266494,
'attack_Romania\xa0': 1.1988135127901296,
'attack_Russia\xa0': 1.5656224767367006,