a = "20200107 1180.3489999999999 223.56720000000001 191.21019999999999"

print ' '.join([a.split()[0], ] + ['%0.2f' % float(i) for i in a.split()[1:]])

 

d = {20200107:[ 1180.3489999999999, 223.56720000000001, 191.21019999999999]}

 

print ' '.join([str(d.items()[0][0]), ] + ['%0.2f' % float(i) for i in d.items()[0][1]])

 

# If you know the key, as in:

for key in d:

    print ' '.join([str(key), ] + ['%0.2f' % float(i) for i in d[key]])

 

'''

>>> 20200107 1180.35 223.57 191.21

20200107 1180.35 223.57 191.21

20200107 1180.35 223.57 191.21

>>>

'''