python中精确输出JSON浮点数的方法

import json as json

data = [ 0.333, 0.999, 0.1 ]
print json.dumps(data)

import json
json.encoder.FLOAT_REPR = lambda x: format(x, '.3f')

data = [ 0.333, 0.999, 0.1 ]
print json.dumps(data)