a =
"20200107 1180.3489999999999
print ' '.join([a.split()[0], ] + ['%0.2f' % float(i)
for i in a.split()[1:]])
d = {20200107:[ 1180.3489999999999,
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
>>>
'''