HDF5读取与写入

1.基本的读取与写入
frame=pd.DataFrame({'a':np.random.randn(100)})
path='/Users/youshiqi/lianghaiming/Desktop/examples/mydata9.hdf5'

store=pd.HDFStore(path)#

store['obj1']=frame

store['obj2']=frame['a']
print（store['obj1'])

2.数据选择

store.put('obj3',frame,format='table')#put

b=store.select('obj3',where=['index>90'])#select

print(b)

3.用pd进行写入与读取

frame.to_hdf('/Users/youshiqi/lianghaiming/Desktop/examples/mydata9.hdf5','obj5',format='table')

c=pd.read_hdf('/Users/youshiqi/lianghaiming/Desktop/examples/mydata9.hdf5','obj5')

print(c)