Numpy warning visibledeprecationwarning: creating an ndarray from ragged needed sequences

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Warning

solve

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Warning

This is what I wrote read npz File code ,

datas = np.load("bsm.npz", allow_pickle=True)
print(datas.files)
for key, arr in datas.items():
    print(key, ": ", arr)

After executing the code , Can output the expected results , But also got a warning , as follows ： 

VisibleDeprecationWarning: Creating an ndarray from ragged nested sequences (which is a list-or-tuple of lists-or-tuples-or ndarrays with different lengths or shapes) is deprecated. If you meant to do this, you must specify 'dtype=object' when creating the ndarray.
  val = np.asanyarray(val)

  solve

      In fact, this is not a mistake , Just the new version numpy A warning from , You can ignore . Of course, it always affects the beauty , You can turn off the warning directly .

      This is because of the new numpy edition , take Create lists or tuples of different lengths or shapes or ndarray A list or ndarray Functions of tuples Will be discarded , Although it can run , But always prompt Warning Still very uncomfortable , Besides, you can't use it like this anymore .

Try the solution of network transmission ：

• Use earlier numpy edition
• add to dtype=object
• Add a line of ignore error code

（1） Try it. There is a saying on the Internet that is to add “dtype=object”,

# 3. Load data 
datas = np.load("bsm.npz", allow_pickle=True, dtype=object)
print(datas.files)
for key, arr in datas.items():
    print(key, ": ", arr)

But it's still wrong , I won't even output the results , 

（2） Let's try another saying on the Internet ：numpy Version of is too high , Need to reduce numpy Version of .

Check your own numpy Version of , I am now numpy The version is 1.23.0,

  ok , Let's reinstall the lower version numpy try ,

  Waiting for the installation to complete , Wrong report , 

ok .

（3） I also saw a saying on the Internet ：

np.warnings.filterwarnings('ignore', category=np.VisibleDeprecationWarning)
 or 
np.warnings.filterwarnings('error', category=np.VisibleDeprecationWarning)

Let's try ,

  It doesn't seem to work ......

（4） Finally, I decided to ignore it ......